Model 387 schematics

Model 387 Schematics (01 of 59)
SK30218
SH
NO.
TRAILERLOAD
CENTER
MEGA FUSES
SCALE 1:20
SLEEPERLOAD
CENTER
TITLE
1) INDEX SYMBOL KEY
2) HARNESS FLOWCHART
3) +12V POWER DISTRIBUTION
4) NEGATIVE POWER DISTRIBUTION
5) +12V POWER DISTRIBUTION (OPTIONAL DISCONNECT)
6) WIPER/WASHER
7) HORN
8) MANUAL FANCONTROL
9) HVACCUMMINS/CATERPILLAR
10) TURN SIGNAL/STOP/HAZARDS/AUX TRAILER
11) REVERSE LAMPS
12) MARKERLAMPS
13) HEAD LAMP/DRL
14) FOGLAMPS
15) FUEL HEATER
16) AIRDRYER
17) INTERFACE MODULE
18) SPOT LAMPS
19) LOAD LAMPS
BRACKET MOUNTED/FLUSHMOUNTED/
MUTIPLE/COIL 10’
20) FLUORESCENT LAMP SLEEPER
21) FLOORLAMP
22) ETHERSTART CATERPILLAR
23) WINDOWLIFT
24) CENTRAL DOOR LOCKS
25) DOORLAMPS/DOME LAMPS
26) PREMIUMSOUND
27) SLEEPERTOOL BOX LAMPS
28) SLEEPERCLOCK
29) AUX FAN
30) SLEEPERREADINGLAMPS
31) REFRIGERATOR UNIT REFER
32) SLEEPERPOWERACCESS OUTLETS
33) SLEEPERFLOOR LAMP
34) SLEEPERHVAC
35) DIGITAL MESSAGE CENTER
36) ABS LOW
37) ABS HI
38) CAB CIGAR LIGHTER PWRCOMM
39) SPARE SWITCHES
40) TWO SPEED/INTER/FIFTH WHEEL/DIFF LOCK/PTO
41) LOWCOOLANT
42) EATONTOP 2 TRANSMISSION
43) MIRROR CONTROL/HEATER
44) ENGINE BRAKE/CRUISE CONTROL/DIAGNOSTIC
45) RADIO
46) SPARE POWER/SYSTEMSLEEPER
47) CATERPILLAR CUMMINS ENGINE ECU/TPS/
SPEED SENSOR/INTERUPT/WARNING LAMPS
48) SMCSPEEDOMESSAGE CENTER
49) DATA LINK
50) CAB SPARE POWER/SYSTEMEXPANSION
51) CB RADIO
52) BACKLIGHTING+12VOLTS
53) NEGATIVE SWITCH LINKS
54) SPLICE LOCATION- DISTRIBUTION
55) SPLICE LOCATION- DISTRIBUTION
56) ASHTRAY
57) CAB/CHASSIS HARNESS LAYOUT
58) SLEEPERHARNESS LAYOUT
59) FUEL HOT LINE
A
SYMBOL/ABBREVIATION KEY
1)
2)
STUD
S1
SPLICE
3)
RING TERMINAL CONNECTORS
4) NUMBERS EX
CIRCUIT DESCRIPTION
286
SUFFIX
-1
FOR CIRCUIT NUMBER FUNCTION SEE SK06520
5)
RED SOLIDCOLORS
RED/BLACK SOLID COLORWITHSTRIPE
SOLID/STRIPE
6)
7) 1
8) CLC
BUSS BAR
CONNECTORAPPEARS ONMULTIPLE SHEETS
CHASSIS LOAD CENTER
9) SLPR SLEEPER
10) TRLR TRAILER
11)
MULTI CORE CABLE
12)
CONTINUED TO OTHER SH XX
13)
MOMENTARY CONTACT
CONTACT
14)
SHEET NUMBER
SWITCH
BULB
CHASSIS
LOAD CENTER
SCALE 1:20
ALPHA
A
CAB
LOADCENTER
(BEHIND GLOVEBOX)
SLEEPER
OPTIONAL EXPANSION
01
CAB OPTIONAL
EXPANSION
(BEHINDGLOVEBOX)
PD8A3417.FRM
NA
NA
Model 387 Schematics (02 of 59)
SK30218
A
BAT +
MEGA FUSE
ASSY
ABS (HARNESS)
CAB
TRAILER
(HARNESS)
LOAD
CENTER
HOTLINE
POWER
HOTLINE
CHASSIS
(HARNESS)
HOTLINE
CAB
(HARNESS)
ABS (HARNESS)
CHASSIS
W/L BAR
INSTRUMENTS
37WAY
CHASSIS
(HARNESS)
LOAD
CENTER
CAB (PC)
LOAD
CENTER
TRAILER
CABLES
SLEEPER (PC)
LOAD
CENTER
HEADER
(HARNESS)
HOOD
(HARNESS)
CHASSIS
(HARNESS)
COWL
(HARNESS)
SLEEPER
(HARNESS)
ENGINE
(HARNESS)
CAB
(HARNESS)
STOP L/P
(HARNESS)
SIDE REPEATER
(HARNESS)
DOOR
CONTROL
(HARNESS)
LOAD
LIGHT
(HARNESS)
DASH
ENGINE
HARNESS
LH DOOR
(HARNESS)
DATA
LINK
RADIO
HARNESS
HARNESS FLOW CHART
MIRROR
GLARE
STOPPER
RH DOOR
(HARNESS)
MESSAGE
CENTER
SMC (SPEEDO
MESSAGE
CENTER
HARNESS)
PD8b3417.frm
02
Model 387 Schematics (03 of 59)
SK30218
A
31-1 , RED
ENG9
B+
ENG8
RED
+
S
RED
ALTERNATOR
G
STARTER
D+
W/L
+
B+
150A
150A
100A
100A
MEGA
FUSES
+
RED(NOT WITH BATTERY DISCONNECT)
1 , RED
86
30
B
239-1 , BLACK
A
A
298-1 , ORANGE
7
87
85
TRLR2
CHASSIS
LOAD CENTER
BATTERY
DISCONNECT
SOLENOID
9
1
REAR
BATTERY
BOX ONLY
ORANGE
2B 3
298-4 , ORANGE
1
CAB
LOAD CENTER
5B 6
BATTERY
DISCONNECT
SWITCH
298-3 , ORANGE
BATTERY DISCONNECT OPTION
CLC8
SLEEPER
LOAD CENTER
B
B
298-1 , ORANGE A
A
239-1 , BLACK
298-1 , ORANGE
RED
3
CAB3
ORANGE
ORANGE
BDC-1 BDC-2
239-1 , BLACK
2
SH 57
OPTIONAL
FIREWALL
BLACK, 239-3
8 10
SH 2
1
4
298-2 , ORANGE
239-4 , BLACK
239-2 , BLACK
7.5A
LOCATION BATTERY BOX
ORANGE
B DC-3
B
ORANGE
ORANGE
BDC-4
ORANGE
1, RED
RED
BATTERIES
S2
S1
298-1D ORANGE
TRAILER
LOAD CENTER
ORANGE
SLPR28
ORANGE
+12V POWER DISTRIBUTION (OPTIONAL DISCONNECT)
PD8b3417.frm
03
Model 387 Schematics (04 of 59)
SK30218
A
04
B+
G
LH
CHASSIS
RAIL
+
S
D+
W/L
ALTERNATOR
BLACK
B-
STARTER
ENG8
-
239-6R, BLACK
ENG6
+
BLACK
-
S1
239-7Q , BLACK
+
BLACK
239-8Q , BLACK
ENG11
239-10J , BLACK
S2
CYLINDER HEAD STUD
JUMPER, BLACK
+
239-15G , BLACK
239-1 , BLACK
239-17D , BLACK
BATTERIES
SH 5
S2
239-16, BLACK
239-4BB , BLACK
239-1JJ , BLACK
CLC4
CLC6
HOOD8
SH 2
TRLR3
S2
S5
239-15H
BLACK
239-3E , BLACK
SH 10
CLC9
ENGINE
CAB
SH 53
SH 53
SH 24
239-16E
BLACK
239-14J
BLACK
239-9L
BLACK
S10
S9
239-3JJ , WHITE
239-2JJ , WHITE
TO
TRAILER
INTERFACE
CHASSIS5
AXLE
239-1F , BLACK
SH 10
SH 9
239-57B , BLACK
239-2LL , BLACK
CHASSIS7
AXLE
1
TRAILER
LOAD CENTER
X1-11B, BLACK
SH 36
X1-12B, BLACK
SH 36
PASSANGER FOOTWELL
239-11J
BLACK
F
CHASSIS11
TAIL LAMP ASSY
S1
NEGATIVE
POWER DISTRIBUTION
FIREWALL STUD
239-1MM, BLACK
FLOOR
RADIATOR
BLACK
D
CHASSIS2REP1
SPARE
S1
239-7S , BLACK
239-13G
BLACK
S3
239-1KK, BLACK
LH
CHASSIS
RAIL
239-2KK
BLACK
239-2MM, BLACK
S2
239-1LL , BLACK
S4
CLC11
JUMPE,R BLACK
239-1NN
BLACK
CHASSIS12
239-10L
BLACK
A
CHASSIS10
SPARE
SLEEPER
LOAD CENTER
S2
239-16F
BLACK
SLPR29
SLEEPER FLOOR
PD8b3417.frm
S1
Model 387 Schematics (05 of 59)
SK30218
SH 14
298-2AB, ORANGE
A
05
CHASSIS LOAD CENTER
298-6C , ORANGE
20A
20-1 , ORN/BLACK
SH 11
SPARE
SPARE
SH13
SPARE
SPARE
SH 22
EITHER
SPARE
286-1B , RED
50A
SPARE
SPARE
40A
20A
20A
LH HEADLAMP
SH 13
RH HEADLAMP SH 13
HVACHTR
BLOWER
SH 34
FAN
SPARE
5A
20A
FOG LAMPS
15A
15A
15A
10A
20A
10A
15A
15A
SPARE
30A
SH 47
ENGINE BATTERY
SH47
ENGINE BATTERY
30-1A , BLACK/ORANGE
30A
SH 47
ENGINE BATTERY
30A
30A
SH 47
ENGINE STOP
STOP LAMP, SH 43
286-2A, RED
SH 16, AIR DRYER
SH17, INTERFACE MODULE
SH 17, INTERFACE MODULE
SH 9
239-12, BLACK
SH 15, FUEL FILTER
39-2 , ORANGE/BLUE
SPARE
SH 9, A/C CLUTCH
SH 9
S2
SH47, ENGINE IGNITION
3-1A , WHITE
304-1C, RED
239-12J, BLACK
SH 8, FAN )
SH 9
SH 13, DRL
SH 9
39-1A , ORANGE/BLUE
IGNITION
87 87A
85
REVERSE LAMPS
242-1B , RED
304-2B , RED
WIPER/WASHER
20A
S4
86 30
START
87 87A
85
SPARE
304-5B, RED
SPARE
20A
A8-1A, BROWN
86 30
SPARE
304-3D , RED
286-1, RED
20A
8-1A , BROWN
A29-1A, PURPLE
SH 11
SH 12
MARKER LAMPS
SH 10
TURN SIGNAL
30A
SH 10
SPARE
20A
SH 13
15A
298-3B , ORANGE
SPARE
20A
29-1 , PURPLE
29-1A , PURPLE
WITH OVER CRANK PROTECTION
SPARE
20A
ENG22 +
S
A
B
286-2 , RED
A29-1 , PURPLE
SH 50
B522-1, RED/BLACK
298-1, ORANGE
SPARE
STARTER
S2
239-12, BLACK
239-13, BLACK
ENG23
ENG24
A A
B B
ENG25
A
B
239, BLACK
A239, BLACK
239, BLACK
WITHOUT OVER CRANK PROTECTION
TRLR2
TRAILER LOAD CENTER
CAB LOAD CENTER
SLEEPER LOAD CENTER
CAB PANEL
SH 22
1 IGNITION
0 SWITCH
3
6
2
CAB
LOAD
CENTER
S4
304, RED
1
A29-2 , PURPLE
12-1 , ORANGE
SH 50
298-1A , ORANGE
CAB3
1
FOR SPARE
SH 46
+12V POWER
AND STARTING
226-5D, RED
25A
SH 34
PD8b3417.frm
Model 387 Schematics (06 of 59)
SK30218
A
SH5
397-3A, RED
FW5
7
397-1 , RED
3
398-1 , RED/BLUE
5
403-1 , RED/BLACK
402-1 , RED/YELLOW
S1
S7
239-1 , BLACK
397-2A, RED
P
FW2
WASHER
MOTOR
1 FW3
CLC12
S2
404-1A ,
LtBLUE/YELLOW
239-16, BLACK
404-1B , LtBLUE/YELLOW
402-1A, RED/YELLOW
402-1B, RED/YELLOW
398-1A, RED/BLUE
403-1A , RED/BLACK
397-1B, RED
398-1B, RED/BLUE
M
404-1 , LtBLUE/YELLOW
7 6 5 4 3 2
403-1B , RED/BLACK
WIPER
MOTOR
239-4 , BLACK
1
397-1A, RED
2
4
239-2 , BLACK
403-1B , RED/BLACK
402-1B , RED/YELLOW
239-47, BLACK
397-1B , RED
398-1B , RED/BLUE
S1
397-3 , RED
CAB104 3 2 1
2 1 3 4
CAB9
WIPER/WASH
SWITCH
WIPER/WASHER
PD8b3417.frm
06
Model 387 Schematics (07 of 59)
SK30218
243-1B ,
A
FIREWALL
PINK/BLACK
CAB LOAD
CENTER
PINK/BLACK
A243-1 , PINK/BLACK
243-1B , PINK/BLACK
FIREWALL
CAB40
STEERING COLUMN
1
OEM HARNESS
1
243-1A,
1
1
CLC12
FW6
243-1 ,
PINK/BLACK
239-3CC, BLACK
S1
B
A
HORN
HORN
PD8b3417.frm
07
Model 387 Schematics (08 of 59)
SK30218
A
SH 5
CUMMINS
RED
S1
A
B
FAN
SOLENOID
239-5 ,
220-1 ,
BLACK
WHITE/LtGREEN
FW4
226-1 ,
NOTE: FAN SHOWN IN "ON" CONDITION
8
220-1A ,
WHITE/LtGREEN
CLC12
1
3
ENGINE
FAN
7
4
5
2
BLACK/GREEN
A522-1 ,
GREEN/WHITE
A220-1 ,
WHITE/LtGREEN
522-1A ,
A522-1A , GREEN/WHITE
A220-1A ,
WHITE/GREEN
WHITE/GREEN
9
2B 3
MANUAL
FAN
SWITCH
1
6
522-1B , WHITE/GREEN
5B 4
8 10
SH 53
B646-1A ,
239-25 , BLACK
SH 52
253-7 , LtBLUE
522-1 ,
B646-1 ,
CATERPILLAR
WHITE/GREEN
BLACK/GREEN
13
12
OEM HARNESS
13
CUMMINS
ECU
12
226-1M , RED
SH 5
NOTE: FAN SHOWN IN "ON" CONDITION
S1
B
239-5U , BLACK
220-1B , WHITE/LtGREEN
FW4-A
FAN
SOLENOID
MANUAL FAN CONTROL
220-1C , WHITE/LtGREEN
A
7
A522-1B , GREEN/WHITE
1
A220-1C, WHITE/LtGREEN
522-1C , WHITE/GREEN
3
5
2
A522-1C , GREEN/WHITE
4
9
2B 3
A220-1D , WHITE/GREEN
522-1E , WHITE/GREEN
1
6
ENGINE
FAN
MANUAL
FAN
SWITCH
5B 4
8 10
B646-1B , BLACK/GREEN
522-1D , WITE/GREEN
239-10C , BLACK
239-25C , BLACK
SH 53
253-7B , LtBLUE
SH 52
CATERPILLAR
ECU
S2
PD8b3417.frm
08
Model 387 Schematics (09 of 59)
SK30218
A
09
A
B
93-1B ,
C
180-1 , YELLOW/WHITE
A
457-3 , BLACK
D
180-1 , YELLOW/WHITE
B
A220-1E, WHITE/LtGREEN
E
570-3 , YELLOW/WHITE
LtGREEN/WHITE
CATERPILLAR
ECU
ENG14-A
F
A/C PRESSURE
SWITCH
CAB51
239-59 , BLACK
A
152-1 , RED/YELLOW
C
342-3 , YELLOW/WHITE
E
629-2 , BLUE
F
634-2 , WHITE
G
629-1 , BLUE
342-5 , YELLOW/WHITE
A
B
TEMP
TEMP-1, GRAY/BLACK B SENSOR
A
CAB58
WHITE/LtGREEN
LtGREEN
17
OEMHARNESS
18
17
18
CUMMINS
ECU
ENG14
A/C PRESSURE
SWITCH
HVAC
H
A220-1B,
A646-1 ,
239-59 , BLACK
S16
342-1 , YELLOW/WHITE
CAB50
239-62 , BLACK
CAB
LOAD CENTER
239-60 , BLACK
B
93-1A,
LtGREEN/WHITE
A
239-58 , BLACK
S13
A248-1, RED/BLACK
239-6S ,
BLACK
ENG15
A/C
COMPRESSOR
253-24 , LtBLUE
570-4 , YELLOW/WHITE
SLEEPER8
S2
SH 34
8
SLPR
45-1 , LtBLUE/BLACK
D
212-1 , RED/GREEN
C
240-1 , LtGREEN/WHITE
B
153-1 , RED/BLUE
B93-2 ,
LtGREEN/WHITE
SH 5
B93-1 ,
1
CAB49
5
A629-1 , BLUE/BLACK
G
A634-1 , WHITE/BLACK
F
570-5 , YELLOW/WHITE
H
239-60 , BLACK D
TEMP-1, GRAY/BLACK C
A B C D
A B C D E F G H
LtGREEN/WHITE
629-1 , BLUE
RED/GREEN
212-1 ,
RED/BLUE
CAB48
240-1 ,
153-1 ,
WHITE/BLACK
LtBLUE
YELLOW/WHITE
A634-1 ,
253-24 ,
570-5 ,
BLUE
WHITE
634-1 ,
629-2 ,
YELLOW/WHITE
BLACK
634-2 , WHITE
239-58 ,
RED/YELLOW
CAB46
342-2 ,
152-1 ,
BLUE/BLACK
YELLOW/WHITE
A629-1 ,
570-2 ,
BLACK
239-62 ,
RED/BLACK
342-4 , YELLOW/WHITE
A B C D
LtGREEN/WHITE
3
4
A/C CLUTCH
93-1 ,
A
LtGREEN/WHITE
634-1 , WHITE
B
A248-1 ,
HVAC
UNIT
D
2
HVAC
MODULE
E
B
A
CAB52
93-1B, LtGREEN/WHITE
45-1 ,
239-57 , BLACK
LtBLUE/BLACK
A93-1 , LtGREEN/WHITE
45-1A, LtBLUE/BLACK
SH 4
CAB47
HVAC CONTROLLER
HVAC CUMMINS/CATERPILLAR
PD8b3417.frm
SH 5
Model 387 Schematics (10 of 59)
D
242-1B , RED
FLASHER
UNIT
3-2 ,
86 30
87 87A
85
STOP LAMP
86 30
STOP LAMP
S6
S5
87 87A
85
87 87A
85
WHITE
GREEN
228-1B , YELLOW/BLACK
B A
A B
A281-1A , WHITE
239-11A , BLACK
STP1 HOOD14
281-2 ,
228-1A, YELLOW/BLACK
A281-1 , WHITE
227-1B , GREEN/BLACK
227-4 , GREEN/BLACK
228-4 , YELLOW/BLACK
85
C
37-1B ,
38-1B ,
227-3 , GREEN/BLACK 9 9 227-1D ,
228-3 , YELLOW/BLACK 10 10 228-1D ,
4 4
GREEN
YELLOW
GREEN/BLACK
YELLOW/BLACK
LH
REAR TURN
SIGNAL
TLJ2-B
C
37A, BLACK
239-4X , BLACK
S4
CHASS1
D
B
A
B A
SH 12
87 87A
227-1E , GREEN/BLACK
281-1B , YELLOW/BLACK
228-1E , YELLOW/BLACK
RH
REAR TURN
SIGNAL
TLJ1-B
CLC3
239-1KL , BLACK
227-1C , GREEN/BLACK
228-1C , YELLOW/BLACK
REP1
S2
239-2C , BLACK B
C
LH
SIDE
REPEATER
REP2
239-3A , BLACK B
C
REP3
STP2
STOP
LAMP
SWITCH
TO TRAILER
INTERFACE
86 30
2 2
S1
239-7 , WHITE
TURN SIGNAL
239-1A, BLACK
A281-1B , WHITE
LH
FRONT
TURN
SIGNAL
GREEN
227-1A, GREEN/BLACK
WHITE
A281-2 ,
RH
FRONT
TURN
SIGNAL
A227-1 , GREEN
279-1 , RED
A228-1 , YELLOW
WHITE
86 30
SH 5
AUX
, BLUE
TURN SIGNAL
3-1A , WHITE
39-2 , ORANGE/BLUE
286-1B , RED
39-1A , ORANGE/BLUE
239-4A , WHITE
87 87A
SH 4
239-6 , WHITE
86-3
37-1A , GREEN
38-1A , YELLOW
227-2A , GREEN/BLACK
228-2A , YELLOW/BLACK
281-1A , WHITE
39-1B , ORANGE/BLUE
A281-2 , WHITE
37-1 , GREEN
38-1 , YELLOW
227-1 , GREEN/BLACK
228-1 , YELLOW/BLACK
281-1 , WHITE
39-1 , ORANGE/BLUE
87-3
85-3
86 30
85
WHITE
CAB6
239-3 , WHITE
ACC
SH 5
B
SH 5
1
239-5A, WHITE
WARNING
LAMP
BAR
10
CAB PANEL
281-1 , WHITE
10
SH 5
SH 5
A
A39-1 , ORANGE/BLUE
HAZARD
SWITCH
228-2 , YELLOW/BLACK
CAB
24
LOAD
CENTER
14
LIGHT BAR
SH 5
A
CAB8
A
TRAILER LOAD CENTER
CAB PANEL
SH 5
227-2 , GREEN/BLACK
B
SH 47
C
3-1 ,
TURN
SIGNAL
SWITCH
SK30218
TURN SIGNAL/STOP/HAZARD/AUX TRAILER
PD8b3417.frm
RH
SIDE
REPEATER
Model 387 Schematics (11 of 59)
SK30218
A
11
SH 5
242-2 , RED
242-1 , RED
1
3
5
4
REVERSE LAMP
2
NOT USED
A269-2 , PINK/WHITE
269-1 , PINK/WHITE
3
3
S5
269-1A , PINK/WHITE
269-3 , PINK/WHITE
269-2 , PINK/WHITE
A269-1 , PINK/WHITE
CLC3 CHASS1
A
CHASS8
REVERSE
LAMP
SWITCH
B
A
239-7T , BLACK
A269-1A , PINK/WHITE
SPARE
BACKUP
S2
269, BLACK
ENG16
A
LH
REVERSE LAMPS
TLJ1-A
A
TLJ2-A
RH
REVERSE LAMPS
PD8b3417.frm
Model 387 Schematics (12 of 59)
SK30218
A
12
SH 53
7
9
3
2B
239-14 , BLACK
239-13 , BLACK
239-12A , BLACK
5-1 , ORANGE/BLACK
1
6
TRAILER LOAD CENTER
SH 9
SH 53
239-7 , WHITE
5B 4
8 10
CAB
PANEL
CLEARANCE
LAMP
SWITCH
HDR2
2
1
5-1A , ORANGE/BLACK
239-1C , BLACK
HEADER
SH 5
25-1 , ORANGE/BLACK
25-2 , ORANGE/BLACK
86 30
CAB LOAD CENTER
86 30
1
5-5 , ORANGE/BLACK
239-5B , BLACK
S3
S2
239-7U , BLACK
8-3B , BROWN
6
8
HOOD3
6
8
HOOD2 1
6
8
HOOD3-A7
6
8
HOOD2-A7
2
MARKER LAMPS
1
BLACK
BROWN
BLACK
BROWN
HOOD7
S6
S4
8-4B ,BROWN
239-9M, BLACK
8-5B , BROWN
8-6 , BROWN
S5
1
8-1C, BROWN
2
HOOD3-A6
RH
MARKER
LAMP
2
1
CLC3
CHASS1
8
8
C
S7
8-3A , BROWN
CHASS2
REP1
C
HOOD4
5-2A , ORANGE
HDR6
8-2 , BROWN
A5-1A , BLACK
A
SPARE
MARKER
CHASS9
SPARE
MARKER
5-2AB, ORANGE
S3
8-5A , BROWN
1
A8-1 , BROWN
8-4 , BROWN
NOT USED
5-4 , ORANGE/BLACK
239-4B , BLACK
SH 5
8, BLACK
2
8-1A , BROWN
8-4A , BROWN
HDR5
8-3 , BROWN
S1
B
HOOD2-A6
LH
MARKER
LAMP
A
RH REPEATER
8-3H , BROWN
A5-1 , ORANGE/BLACK
A8-1B, BROWN
8-1B , BROWN
5-3 , ORANGE/BLACK
239-3B , BLACK
8-2A, BROWN
1
8-2B , BROWN
2
8-1H, BROWN
HDR4
ICC
LAMPS
5-1B , ORANGE/BLACK
85
CAB
FIREWALL
8-2G , BROWN
5-2 , ORANGE/BLACK
239-2A , BLACK
8-5 , BROWN
1
85
8-1 , BROWN
2
MARKER
LAMP
87 87A
MARKER
LAMP
87 87A
HDR3
SH 5
20-1 , ORN/BLACK
A5-2 , ORANGE/BLACK
239-15 , BLACK
REP2
A
TLJ1
RH
TAIL
LAMP
B
TLJ2
LH
TAIL
LAMP
REP3
LH REPEATER
PD8b3417.frm
Model 387 Schematics (13 of 59)
SK30218
A
13
298-5 , ORANGE
TURN
SIGNAL SWITCH
CAB7
86
30
85
87 87A
HEADLAMP
D C B A
DM4-3, LtBLUE
HI BEAM W/LAMP
A4R-1 , LtBLUE
CAB LOAD CENTER
20A
DM4-1A, LtBLUE
20A
5A
3
S5
4
5
DRL LH
S2
S5
B5-1 , ORANGE/BLACK
7
9
239-19A , BLACK
239-17B , BLACK
E4-2 , LtBLUE/BLACK
SH 53
4
HI BEAM LH
3
5
2
4
HI BEAM RH
2
1
S2
1 CAB13
DRL
DISABLE
4
2
B1
42-RH-2 , BLUE/WHITE
239-9 , BLACK
3
5
239-7B , BLACK
42-RH-1 , BLUE/WHITE
4 3 2
1
3
41-RH-1 , RED/BLACK
239-18B , BLACK
7 6 5
PASS SIGNAL
SWITCH
242-7 , RED
242-6 , RED
242-5 , RED
5
7
DRL RH
239-13A , BLACK
1
239-16C, BLACK
SH 52
SH 52
SH 53
253- , LtBLUE
239-15E , BLACK
253-3K, LtBLUE
239-10 , BLACK
239-8A , BLACK
239-12B , BLACK
B4-2B , LTBLUE
253-1 , LtBLUE
239-9A , BLACK
10 9 8
4
2
S6
227-5 , GREEN/BLACK
B4-3 , LtBLUE
HEAD LAMP
SWITCH
239-14A , BLACK
228-5 , YELLOW/BLACK
3
5
B2
C1
C2
B328-1 , LtGREEN
SH 14
A42, BLUE/WHITE
SH 14
9
HOOD3-2
3
2B
1
6
5B 4
8 10
2B 3
S5
1
5B 6
4
8 10
8-5G , BROWN
BROWN
BROWN
S1
2
1
DRL
3
239-1RH
S2
239C, BLACK
A42-RHA, BLUE/WHITE
BLACK
BLACK
BLUE/WHITE
41-RH, RED/BLACK
42-RH, BLUE/WHITE
RED
BLUE/WHITE
A
41-LH , RED/BLACK
42-LH , BLUE/WHITE
A42-LHA, BLUE/WHITE
239D, BLACK
RED
BLUE/WHITE
BLUE/WHITE
BLACK
A
B
C
RH
HEAD LAMP
HOOD3-A3
HOOD2-A3
S3
HEADLAMP/DRL
S4
239-1LH
8-3J , BROWN
BLACK
BROWN
C
3
1
S1
LH
HEAD LAMP
B
BROWN
DRL
2
HOOD2-4
PD8b3417.frm
B4-2, LtBLUE
PARK BRAKE
SWITCH
239-2LH
239-2RH
A42-LH , BLUE/WHITE
42-LH-1 , BLUE/WHITE
41-LH-1 , RED/BLACK
SH 53
2
1
A328-1 , LtGREEN
253-2 , LtBLUE
1
239-38 , BLACK
SH 14
242-4 , RED
A328-1 , LtGREEN
A328-1A , LtGREEN
SH 5
B328-2 , LtGREEN
DRLDIS-1 , WHITE/BLACK
43-LH-2 , BLUE/WHITE
E4-1 , LtBLUE/BLACK
DM4-2, LtBLUE
A42-RH, BLUE/WHITE
DRLDIS-1A, WHITE
42-LH-3 , BLUE/WHITE
E4-1A , LtBLUE/BLACK
CAB PANEL
B4-2 , LtBLUE
239-8 , BLACK
B4-1 , LtBLUE
DM4-2, LtBLUE
DRLDIS-2 , WHITE/BLACK
4R-1, LtBLUE
CAB
FIREWALL
B4-1A , LtBLUE
DM4-2A, LtBLUE
DRLDIS-2A, WHITE/BLACK
4L-1 , LtBLUE
6
LIGHT BAR
SH 52
WARNING
LIGHT 6
BAR
A4L-1 , LtBLUE
D1
D2
Model 387 Schematics (14 of 59)
SK30218
CAB
LOAD
CENTER
CAB
FIREWALL
A7-2 , PURPLE
1
298-2AB , ORANGE
SH 5
27-1 , PURPLE
SH 5
A
14
3
4
5
FOG LAMP
DISABLE
7-1 , PURPLE
2
CAB PANEL
SH 53
SH 52
SH 53
SH 52
A7-1 , PURPLE
239-8 , BLACK
239-9 , BLACK
A7-2 , PURPLE
4
FOG LAMP
7-2A, PURPLE
A7-1A , PURPLE
A42, BLUE/WHITE
7-3 , PURPLE
SH 13
3
2
HOOD5
S2
7-1A , PURPLE
7-2B , PURPLE
239-12 , BLACK
A
LH FOG LAMP
B
S6
HOOD6
SH 13
7-3A , PURPLE
239-13H , BLACK
A
RH FOG LAMP
B
S3
FOG LAMP
SWITCH
7
1
5
239-22B , BLACK
239-22A , BLACK
253-4E , LtBLUE
239-20A , BLACK
7-3B, PURPLE
253-5C, LtBLUE
7-3B , PURPLE
SH 13
9
3
2B
1
6
5B
8
4
10
FOG LAMPS
PD8b3417.frm
Model 387 Schematics (15 of 59)
SK30218
A
15
1
SH 5
382-1A, LtGREEN/RED
382-1 , LtGREEN/RED
1
FUEL HEATER
HOOD10
2
FUEL HEATER
PD8b3417.frm
Model 387 Schematics (16 of 59)
SK30218
A
HOOD12
SH 5
384-1A , BLUE
384-1 , BLUE
239-4C , BLACK
A
B
S1
AIR
DRYER
AIR DRYER
PD8b3417.frm
16
Model 387 Schematics (17 of 59)
SK30218
S1
S2
SH 5
A
17
S3
CHASS6
239-8B , BLACK B
AXLE TEMP
REAR
A
CAB
LOAD
CENTER
90-1B , YELLOW/BLUE
90-1A , YELLOW/BLUE
637-1B , LtGREEN
636-1B , PURPLE/BLACK
637-1A , LtGREEN
636-1A , PURPLE/BLACK
NOT USED
673-1A , RED
CAB
FIREWALL
CLC3 CHASS1
36-1B , GRAY/BLACK
35-1A , GRAY/BLACK 5 5
59-1A , VIOLET 7 7
35-1B , GRAY/BLACK
241-1 , GRAY/BLACK
239-11B , BLACK 11 11
2-1A , TAN/BLACK 12 12
326-1A , GREEN
542-1A , LtGREEN
CHASS4
36-1A , GRAY/BLACK 6 6
239-6A , BLACK
AXLE TEMP
FORWARD
B
A
CHASS3
239-12D , BLACK
AUX XMSN
TEMP
A
2-1B , TAN/BLACK
B
239-4D , BLACK
S2
327-1B , BLACK
326-1B , GREEN
CHASS14
60-1 , GRAY/BLACK
326-1 , GREEN
327-1 , GRAY/BLACK
2-1 , TAN/BLACK
35-1 , GRAY/BLACK
59-1 , VIOLET
36-1 , GRAY/BLACK
637-1 , LtGREEN
90-1 , YELLOW/BLUE
673-1 , RED
542-1 , LtGREEN
636-1 , PURPLE/BLACK
NOT USED
327-1A , BLACK
B
F
A
FUEL TANK
SENDER RH
ENG4-B
B
A
PYRO
S1
HOOD14-A
337-1 , BROWN
B
338-1 ,BROWN/BLACK
A
A
AMMETER
NOT AVAILABLE
INTERFACE MODULE
A
C
H
B
F
J
K
HOOD9A B
F
E
1-1 , TAN/RED
E
337-1 , BROWN
G D
338-1 , BROWN/BLACK
239-2D, BLACK
HOOD12-A
239-3C , BLACK
D
C
A
B
1-1 , TAN/RED A
F
LH FUEL TANK
HOOD10A
INTERFACE MODULE
PD8b3417.frm
Model 387 Schematics (18 of 59)
SK30218
A
SH 53
239-26D , BLACK
A132-1 , RED/TAN
253-8B , LtBLUE
253-7C, LtBLUE
239-27C , BLACK
SH 52
SH 52
7
2B
9
SH 53
CAB
LOAD
CENTER
132-1 , RED/TAN
CAB
PANEL
HEADER
239-11C , BLACK
132-1A , RED/TAN
132-2 , RED/TAN
239-12E , BLACK
1
2
HDR12
1
2
HDR13
3
1
6
5B
8
4
10
SPOT LAMP
SWITCH
SPOT LAMPS
PD8b3417.frm
18
Model 387 Schematics (19 of 59)
SK30218
A
19
J2
A
HDR11 J1
CAB
LOAD
CENTER
SH 52
239-54 , BLACK
253-23A , LtBLUE
7
2B
1
1
2
2
3
3
249-1C , RED/TAN
239-1D , BLACK
249-2B , RED/TAN
239-10A , BLACK
4
4
239-2B , BLACK
B
LOAD
LAMPS
J3
A
B
CAB
FIREWALL
BRACKET MOUNTED
249-1 , RED/TAN
239-55 , BLACK
SH 53
239-56 , BLACK
A249-1 , RED/TAN
CAB
PANEL
HEADER
249-1A , RED/TAN
239-9B , BLACK
249-2 , RED/TAN
MUTIPLE FLUSH LOAD LAMP OPTIONS
SINGLE LOAD LAMP OPTION
CAB
LOAD
CENTER
SLEEPER
LOAD
CENTER
C6-SC1
SLEEPER
SLPR8 J1-SC1
7 CAB
9
3
CAB
PANEL
LOAD LAMP SWITCH
SLEEPER 1
CAB
FIREWALL
249-1K , RED/TAN A
B
B B 239-1KA , BLACK
A A
C5-SC1
7
249-2J , RED/TAN
J2-SC3
J2-SC1
FLUSH MOUNTED
249-1B , RED/TAN
1
1
249-1D , RED/TAN
239-6B , BLACK
249-2A , RED/TAN
239-7C , BLACK
2
2
3
3
4
4
239-1EE , BLACK
249-1EE , RED/TAN
239-1G , BLACK
A
B
1
6
SH 52
253-23B , LtBLUE
249-1E, RED/TAN
CAB
LOAD
CENTER HEADER
CAB
PANEL
9
CAB55-SC2
1
CAB
FIREWALL
CAB14-SC2
HDR-1
LOAD
LAMPS
J3-SC4
A
A 249-1KA , RED/TAN A
B
239-1KB , BLACK B
B
239-2MA, BLACK
HDR11_SC2 J1_SC2
22
249-1G , RED/TAN
1
1
249-1H , RED/TAN
6
249-2G , RED/TAN
3
3
249-2H , RED/TAN
ADDITIONAL 10’
A
A
COILED
COILED-1
CABLE COILED (CONNECTION FBO)
5 AMPS MAX PER CIRCUIT
22
5B 4
8 10
SH 53
254-54D , LtBLUE
SH 52
239-23D , BLACK
7 9
2B
3
1
6
9
8
7
2
239-56F , BLACK
LOAD LAMP SWITCH
239-56E , BLACK
1
6
249-1F , RED/TAN
3
239-55E , BLACK
7
2B
239-56B , RED/TAN
239-54A , BLACK
239-55A , BLACK
SH 53
239-56A, BLACK
8 10
B
249-2JA , RED/TAN
J2-SC4
J1-SC4
5B 4
A
239-2M , BLACK
J1-SC3
J3-SC1
J3-SC3
3
10
CAB45-SC2
LOAD LAMP SWITCH
5B 4
LOAD LAMPS
BRACKET MOUNTED/FLUSH MOUNTED AND MULTIPLE/COILED 10’
8 10
PD8b3417.frm
Model 387 Schematics (20 of 59)
SK30218
A
20
C6
CAB
LOAD
CENTER
SLEEPER
1
SLPR17
2
9
3
C5
SLEEPER
LOAD
CENTER
SLEEPER 2
1
CAB
PANEL
CAB
FIREWALL
2
CAB
3
253-1A, LtBLUE
239-24 , BLACK
B19-1, VIOLET/WHITE
A19-1, VIOLET/WHITE
B19-2, VIOLET/WHITE
D19-1, VIOLET/WHITE
7
239-23 , BLACK
SPARE-2B
, WHITE
6
SLEEPER 1
9
2
2B 3
1
5
6
3
4
8
FLUOR LAMP SWITCH
5B
4
8 10
10
SLPR18
253-9 , LtBLUE
239-24B, BLACK
B19-2A, VIOLET/WHITE
280-4 , ORANGE
B19-1A, VIOLET/WHITE
SH 53
SH 52
7
1
239-30 , BLACK
S5
1
2
4
SPARE-1B, WHITE
FLUOR LAMP
3
FLOUR LAMP SWITCH
7
9
2B 3
1
6
5B
4
8 10
FLUORESCENT LAMP SLEEPER
PD8b3417.frm
Model 387 Schematics (21 of 59)
SK30218
A
SH 52
CAB LOAD
CENTER
S8
239-39 , BLACK
226-15 , RED
CAB
PANEL
239-41 , BLACK
FRL-1 , RED/BLACK
S9
B
FRL-2 , RED/BLACK
253-17 , LtBLUE
239-40 , BLACK
A
FRL-3, RED/BLACK
239-43 , BLACK
FRL-4 , RED/BLACK
239-42 , BLACK
S5
CAB31
RH LAMP
A
B
CAB32
LH LAMP
FLOOR LAMP SWITCH
7
2B
9
3
1
6
5B
FLOOR LAMP
4
8 10
PD8b3417.frm
21
Model 387 Schematics (22 of 59)
SK30218
A
22
230-1 ,ORANGE
SH 5
A83-1A , ORANGE/WHITE
1
3
5
4
ETHER
2
SH 52
A29-2 , PURPLE
A83-1 , ORANGE/WHITE
253-8 , LtBLUE
239-28 , BLACK
7
9
2B
3
1
6
5B
4
8
SH 52
239-29A , BLACK
SH 53
239-3D , BLACK
SH 53
253-9A , LtBLUE
83-1 , ORANGE/WHITE
SH 5
ENG12
83-1A , ORANGE/WHITE
1
SH 52
ETHER
SWITCH
ETHER START CATERPILLAR
10
PD8b3417.frm
ETHER
SOLENOID
Model 387 Schematics (23 of 59)
SK30218
A
23
CAB LOAD CENTER
DOOR
253-2B , LtBLUE
239-4G , BLACK
SH 24
226-4A , RED
226-3B , RED
74-1B , TAN/WHITE
1 3
2 4
6 5 1 3 2 4 6 5 1 3 2 4 6 5
73-1B , GRAY/LtBLUE
S1
POSITION 1
253-1C, LtBLUE
POSITION 2
226-1B, RED
POSITION 0
226-3, RED
POSITION 1
226-2, RED
SH 52
1 3
2 4
POSITION 0
6 5 1 3 2 4 6 5
POSITION 2
1 3 2 4 6 5
PASSENGER WINDOW LIFT
PASSENGER WINDOW LIFT
74-1A , TAN/LtBLUE
73-1A , LtBLUE/TAN
74-1C , TAN/WHITE
73-1C , GRAY/LtBLUE
SH 24
S1
S4
S3
253-2L , LtBLUE
226-2G , RED
253-3 , LtBLUE
NOT USED
253-1E , LtBLUE
DOOR5-L
POSITION 1
POSITION 0
POSITION 2
2 1 3 5 4 2 1 3 5 4 2 1 3 5 4
4
3
253-3A , LtBLUE
2
239-5C , BLACK
5
73-2 , LtBLUE/TAN
1
74-2 , TAN/LtBLUE
226-5 , RED
SH 24
B A DOOR7-L
DOOR7-R
B A
DRIVER WINDOW LIFT
M
73-2A, GRAY/LtBLUE
253-1D , LtBLUE
74-2A, TAN/WHITE
S8
226-3A , RED
226-1C , RED
239-3F , BLACK
253-2C , LtBLUE
DRIVER
WINDOW
LIFT
PASSENGER
WINDOW LIFT
MOTOR
M
CAB LOAD CENTER
DOOR
POSITION 1
POSITION 0
POSITION 2
SH 24
226-4 , RED
226-3 , RED
S1
POSITION 1
POSITION 0
POSITION 2
253-1S, LtBLUE
226-3, RED
253-2A , LtBLUE
239-4E , BLACK
226-2, RED
226-1D, RED
SH 52
1 3
2 4
SH 24
74-1 , TAN/WHITE
74-1E , TAN/LtBLUE
74-1D , TAN/WHITE
73-1 , GRAY/LtBLUE
73-1E , LtBLUE/TAN
73-1D , GRAY/LtBLUE
6 5 1 3 2 4 6 5 1 3 2 4 6 5
PASSENGER WINDOW LIFT
239-3F , BLACK
S4
253-2D , LtBLUE
74-2B , TAN/WHITE
1 3
2 4
6 5 1 3 2 4 6 5 1 3 2 4 6 5
226-1A , RED
253-1B , LtBLUE
226-3G , RED
253-2M , LtBLUE
73-2B , GRAY/LtBLUE
S8
S3
226-2H , RED
253-3L , RED
NOT USED
253-1F , LtBLUE
S1
PASSENGER WINDOW LIFT
WINDOW LIFT
B A
PASSENGER
WINDOW
LIFT
DOOR7-RA
M
PD8b3417.frm
Model 387 Schematics (24 of 59)
SK30218
A
24
CAB LOAD
CENTER
DOOR
S5
239-4G , BLACK
239-1J , BLACK
230-1A , ORANGE
POSITION 1
1 3 2 4
POSITION 0
REF_DES7
S1
230-3A , ORANGE
S2
239-4V , BLACK
B
230-4 , ORANGE
A
S2
239-5H , BLACK
239-3F , BLACK
S4
239-4W, BLACK
253-3J , LtBLUE
S1
S3
LOCK2-1, BLACK/GRAY
230-3 , ORANGE
LOCK2-1, BLACK/GRAY
LOCK1-1, GRAY/BLACK
239-6C , BLACK
LOCK1-1, GRAY/BLACK
LOCK1A-1, GRAY/BLACK
LOCK2A-1, BALCK/GRAY
LOCK-2, BLACK/GRAY
LOCK2-1A, BLACK/GRAY
LOCK-1, GRAY/BLACK
LOCK-1A, GRAY/BLACK
LOCK-2A, BLACK/GRAY
LOCK1-1A, GRAY/BLACK
LOCK1A-3, GRAY/BLACK
LOCK2A-3, BLACK/GRAY
S3
POSITION 2
6 5 1 3 2 4 6 5 1 3 2 4 6 5
B A
DOOR9
M
S4
A B
CENTRAL DOOR LOCKS
SH 23
NOT USED
LOCK2A-2, BLACK/GRAY
DOOR
LOCK
SWITCH
253-4 , LtBLUE
230-2 , ORANGE
239-3M , BLACK
LOCK1A-1B, GRAY/BLACK
LOCK2A-1A, BLACK/GRAY
LOCK1A-2, GRAY/BLACK
SH 23
239-5C , BLACK
230-1B, ORANGE
SH 23
239-1P, BLACK
SH 4
POSITION 1
1 3
2 4
DOOR
LOCK
SWITCH
POSITION 0
POSITION 2
6 5 1 3 2 4 6 5 1 3 2 4 6 5
DOOR9_C0
M
PD8b3417.frm
Model 387 Schematics (25 of 59)
SK30218
A
2
1
HDR7
CAB
LOAD
CENTER
HEADER
1
2
19-1C , VIOLET/WHITE
239-6D , BLACK
329-1 , PINK/GREEN
19-2A , VIOLET/WHITE
239-7D , BLACK
329-2 , PINK/GREEN
19-3A , VIOLET/WHITE
239-8C , BLACK
329-3 , PINK/GREEN
3
DRIVER
DOME
LAMP
3
2
1
HDR8
1
CENTER
DOME
LAMP
2
3
3
2
1
HDR9
1
2
3
PASSANGER
DOME
LAMP
3
CAB42-B
CAB
PANEL
329-1A , PINK/GREEN
S11
S5
329-2A , PINK/GREEN
239-49 , BLACK
B
DOOR
SWITCH
A
LH
DOOR
CAB41
19-1 , VIOLET/WHITE
239-50 , BLACK
329-3A , PINK/GREEN
19-1A , VIOLET/WHITE
1
2
19-2 , VIOLET/WHITE
S5
RH
S2
19-3 , VIOLET/WHITE
19-1B , VIOLET/WHITE
2
DOOR8_C2
DOOR
LH LAMP
DOOR
SWITCH
B
239-1K , WHITE
239-3J , WHITE
S5
A
DOOR LAMPS/DOME LAMPS
1
DOOR8_C3
DOOR
RH LAMP
PD8b3417.frm
25
Model 387 Schematics (26 of 59)
SK30218
A
A A
D2 D1
DRAIN-1
DRAIN-29
433-1 , VIOLET
437-1 , VIOLET/BLACK
431-1 , GREEN
435-1 , GREEN/BLACK
432-1 , GRAY
436-1 , GRAY/BLACK
REF DES
430-1 , WHITE
434-1, WHITE/BLACK
C
D
E
F
G
B
C
D
E
F
G H
H
DRAIN-26
DRAIN-28
B
A
DRAIN-27
DRAIN-25
A
PS1
436-1 , WHITE
432-1 , BLACK
RAD2
434-1 , WHITE
430-1 , BLACK
DASH CONNECTION
PSR-1
A
436-2 , WHITE
B
TWEETER
430-2 , BLACK
434-2 , WHITE
A
DRAIN
DRAIN-17
A
A
A
A
B
B
B
B
C
C
C
C
PS7L
PS8L
PS10R
PS3L
B
432-3 , BLACK
PS9R
PS3R
B
434-3 , WHITE
430-3 , BLACK
DRAIN
A
436-3 , WHITE
DRAIN-24
435-1 , WHITE
431-1 , BLACK
DRAIN-18
SPEAKER FRONT
DRAIN
437-1 , WHITE
433-1 , BLACK
A
TWEETER
DRAIN
DRAIN-22
PS2L-1
SPEAKER FRONT
B
436-2 , BLACK
CAB
LOAD
CENTER
239-1 , BLACK
19-1 , VIOLET/WHITE
A252-1 , RED
A
B
C
D
E
F
PS12
A
B
C
D
E
F
PS11
RADIO/
CB
DRAIN
DRAIN-19
DRAIN-20
PS4L
PS4R
433-2 , BLACK
B
431-22 , BLACK
437-2 , WHITE
A
ANTENNA
RADIO
PWR_NEG
, BLACK
PWR_POS
, RED
PS6
E
F
DRAIN-21
435-2 , WHITE
B
437-3 , WHITE
4353-3 , BLACK
DRAIN-23
A
435-3 , WHITE
431-3 , BLACK
SPEAKER REAR
B-PILLAR
FLOOR
GROUND
DRAIN
B
C
H
A
D
G
SPEAKER REAR
DRAIN
DRAIN
SUB WOOFER
PS5
PREMIUM SOUND
1
2
SLEEPER SPARE POWER
SH 46
PD8C3417.FRM
26
Model 387 Schematics (27 of 59)
SK30218
A
329-4, PINK/GREEN
SH 33
SLPR9
1
2
SLEEPER
LOAD
CENTER
SLEEPER 1
LH TOOL BOX LAMP
329-1B , PINK/GREEN
239-8D , BLACK
389-1 , GRAY
239-9C , BLACK
329-2B , PINK/GREEN
239-10B , BLACK
389-2 , GRAY
239-11D , BLACK
LH DOOR SWITCH
SLPR11
1
2
RH TOOL BOX LAMP
RH DOOR SWITCH
SLEEPER TOOL BOX LAMPS
PD8C3417.FRM
27
Model 387 Schematics (28 of 59)
SK30218
A
28
SLEEPER
LOAD
CENTER
SLEEPER 1
226-1E , RED
280-2 , ORANGE
239-5F , BLACK
12:00
CLOCK
SLEEPER CLOCK
PD8C3417.FRM
Model 387 Schematics (29 of 59)
SK30218
A
29
CAB
LOAD
CENTER
HDR14
HEADER
229-1 , VIOLET/WHITE
239-13B , BLACK
1
2
M
AUX FAN
PD8C3417.FRM
AUX
FAN
Model 387 Schematics (30 of 59)
SLEEPER
LOAD
CENTER
SK30218
30
W/LOWER BUNK
SLPR3
1
SLEEPER 1
A
19-1D , VIOLET/WHITE
239-1L , BLACK
19-2B , VIOLET/WHITE
239-2G , BLACK
2
19-2G , VIOLET/WHITE
RH READING
LAMP
SLPR3-SC1
SLPR4
1
2
J2-SC2
RH READING
LAMP
J3-SC2
HI/RH READING
LAMP
1
1
LH READING
LAMP
2
1
2
19-1G , VIOLET/WHITE
239-1AH , BLACK
1
2
2
J1-SC2
239-2AH , BLACK
W/UPPER BUNK
SLEEPER
LOAD
CENTER
19-2H , VIOLET/WHITE
SLPR1-SC1
13
SLEEPER 1
1
14
2
SLEEPER READING LAMPS
19-1DA ,
239-1LA ,
19-2BA ,
239-2GA ,
VIOLET/WHITE
BLACK
VIOLET/WHITE
BLACK
SLPR4_SC1
1
1
2
2
J2-SC5
19-1H , VIOLET/WHITE
239-1AJ , BLACK
LH READING
LAMP
J3-SC5
1
1
2
2
J1-SC5
239-2AJ , BLACK
PD8C3417.FRM
HI/LH READING
LAMP
Model 387 Schematics (31 of 59)
SK30218
A
253-2R, LtBLUE
SH 52
239-20 , BLACK
253-1H , LtBLUE
239-15A , BLACK
SLPR30
REFER
2
1
REFRIGERATOR ON/OFF
SWITCH
BREF-1, BLACK/YELLOW
239-37, BLACK
REF1-1, RED
239-22 , BLACK
SLEEPER
LOAD
CENTER
SLEEPER 2
AREF-1, YELLOW/BLACK
COOLING FAN
SLPR16
FAN2
FAN1
B
A
A
RED
BLACK
B
B
A
A
1
2
, BLACK
RED
B
FAN4
FAN3
REFRIGERATOR UNIT/REFR
REFRIGERATOR
FAN
B
B
A
A
1
2
PD8C3417.FRM
31
Model 387 Schematics (32 of 59)
SK30218
SLEEPER
LOAD
CENTER
SLEEPER 2
A
SLPR21-A
280-1 , YELLOW
239-27A , BLACK
242-1A , RED
139-13A , BLACK
242-2A , RED
239-14B , BLACK
1
SLPR22-A
POWER
ACCESS
1
SLPR19-A
1
2
POWER OUTLET
SLPR20-A
1
2
POWER OUTLET
SLEEPER POWER ACCESS OUTLETS
PD8C3417.FRM
32
Model 387 Schematics (33 of 59)
SK30218
A
33
SLPR13-A
1
SLEEPER
LOAD
CENTER
SLEEPER 1
A329-12, RED
2
FLOOR LAMP
239-12, BLACK
329-6, RED
SH 27
329-4, PINK/GREEN
FLOOR
LAMP
SWITCH
SLEEPER FLOOR LAMP
PD8C3417.FRM
Model 387 Schematics (34 of 59)
SK30218
SLEEPER
LOAD
CENTER
CAB
152-1A , RED/YELLOW
153-1A , RED/BLUE
240-1A , LtGREEN/WHITE
253-10A , LtBLUE
570-1 , YELLOW/WHITE
226-5A , RED
SH 5
87 87A
239-35, BLACK
248-1 , RED
SLEEPER HVAC
S5
3
BLOWER MOTOR
RESISTORS
A
B
BLOWER MOTOR
30
SLEEPER
HVAC
85
2
SPR25-A
153-2 , RED/BLUE
239-18 , BLACK
86
1
S2
239-26A , BLACK
SLEEPER 2
SLPR23-A
A248-1A , RED/BLACK
SH 9
A
239-25A , BLACK
629-1A , BLUE
BUNK TEMP
ACTUATOR
630-1 , RED/BLUE
HVAC CONTROL
HEAD
PD8C3417.FRM
34
Model 387 Schematics (35 of 59)
SK30218
SPARE IGN
POWER
DIGITAL
MESSAGE
CENTER
226-1F ,
230-1C ,
239-1M,
417-1C ,
418-1C ,
253-1J ,
RED
ORANGE
BLACK
PURPLE
WHITE
LtBLUE
2
35
SH 50
TO OPTIONAL SPARE/
POWER EXPANSION
DMC3
1
A
SPARE BAT
POWER
SH 50
SH 49
SH 49
SH 52
DIGITAL MESSAGE CENTER
PD8C3417.FRM
Model 387 Schematics (36 of 59)
SK30218
A
36
ABS1
1
10
8
SH 4
SH 4
5
2
7
6
12
4
9
ABS
LIGHT
BAR
18
18
19
19
20
20
21
21
WARNING
LAMP
BAR
RF SENSOR AND PMV CONNECTORS
1
2 ABS2-B1
X2-3 ,
X2-1 ,
X2-2 ,
X2-4 ,
X2-5 ,
X3-7 ,
X3-8 ,
X3-9 ,
X3-4 ,
X3-5 ,
BLUE
BROWN
GREEN/YELLOW
BROWN
BLACK
GND-A, GREEN/YELLOW A
GND-B, GREEN/YELLOW B
X2-1 , BLUE C
X3-7 , BLUE D
X4-1 , BLUE E
X4-10 , BLUE F
X2-2 , BROWN G
X3-8 , BROWN H
X4-2 , BROWN J
X4-11 , BROWN K
A
2
ABS6-B1 1
L
L
B
C
D
E
F
G
H
J
K
X2-4 , BROWN N N
X2-5 , BLACK
X3-4 , BROWN
X3-5 , BLACK
X4-5 , BROWN
X4-6 , BLACK
X4-8 , BROWN
X4-9 , BLACK
P P
Q Q
R R
S S
T T
U U
V V
ABS7-B1
ABS10-B1
A1 A1
B1 B1
C1 C1
D1 D1
E1 E1
F1 F1
G1 G1
2
1
ABS4-B1
3
2
1
X4-2B
X4-1B
X1-12-2
Z Z
2
X1-12-5
X5-1B
X5-10B
X5-2B
X5-11B
X5-5B
X5-6B
X5-8B
X5-9B
X4-14B
X4-15B
X1-12-6
X5-1B
X5-10B
X5-2B
X5-11B
X5-5B
X5-6B
X5-8B
X5-9B
X4-14B
X4-15B
X4-6B
X4-5B
Y Y
1
ATC CONNECTOR
(OPTION)
ABS11-B1
X2-2B
X2-1B
X1-12-4
X X
ABS LOW
3
X4-4B
X4-7B
W W
X4-3 , GREEN/YELLOW
X4-12 , GREEN/YELLOW
X4-1 , BLUE
X4-10 , BLUE
X4-2 , BROWN
X4-11 , BROWN
X4-5 , BROWN
X4-6 , BLACK
X4-8 , BROWN
X4-9 , BLACK
2
X1-12-3
X4-10B
X4-11B
X1-12-1
X1-12-6
X1-12-2
X1-12-3
X1-12-4
X1-12-5
X2-1B
X3-7B
X4-1B
X4-10B
X2-2B
X3-8B
X4-2B
X4-11B
X4-4B
X4-7B
X2-4B
X2-5B
X3-4B
X3-5B
X4-5B
X4-6B
X4-8B
X4-9B
M M
S1
RR SENSOR AND PMV CONNECTORS
3 ABS3-B1 1
X4-8B
X4-9B
3
X2-5B
X2-4B
ABS
ECU
GREEN/YELLOW
BLUE
BROWN
BROWN
BLACK
2
11
ABS2 ABS1-B1
S2
1
X1-12-1
X3-7B
X3-8B
X1-6-1 , ORANGE/PURPLE
X1-7 , RED
X1-8 , ORANGE
X1-9 , ORANGE
X1-10 , BLACK
X1-16-1 , ORANGE/PURPLE
X1-17 , BLACK/LtGREEN
X1-18 , VIOLET/BROWN
X3-4B
X3-5B
X1-11 , BLACK
X1-12 , BLACK
X1-6-1 , ORANGE/PURPLE
X1-7 , RED
X1-8 , ORANGE
X1-9 , ORANGE
X1-10 , BLACK
X1-16-1 , ORANGE/PURPLE
X1-17 , BLACK/LtGREEN
X1-18 , VIOLET/BROWN
CAB
LOAD
CENTER
ABS5-B1
LF SENSOR AND PMV CONNECTORS
2
1
ABS8-B1
3
2
1
1
2
3
4
5
6
7
6-CHANNEL CONNECTOR
(OPTIONAL)
8
9
10
11
12
ABS9-B1
LR SENSOR AND PMV CONNECTORS
PD8C3417.FRM
Model 387 Schematics (37 of 59)
SK30218
9
239-1N , BLACK
CAB
LOAD
CENTER
10
18
18
19
19
1
X1-6-1A , ORANGE/PURPLE 2
7 ABS
X1-7A , RED
6
X1-10A , BLACK
X1-16-1A , ORANGE/PURPLE
4
RF SENSOR AND PMV CONNECTORS
20
1
ABS2-B2
B
A
SH 49
J1587
ABS2-A ABS1-B2 X1-12-1A
S2
X2-3A , GREEN/YELLOW
X2-1A , BLUE C C
X3-7A , BLUE D D
X2-4A , BROWN
X2-5A , BLACK
X4-1A , BLUE E E
X4-10A , BLUE F F
X4-1C
X4-10C
X2-2A , BROWN G G
X3-8A , BROWN H H
X2-2C
X3-8C
X4-2A , BROWN J J
X4-11A , BROWN K K
X4-4A , BROWN L L
X4-2C
X3-9A , GREEN/YELLOW
X3-4A , BROWN
X4-7A , BLUE M M
X2-4A , BROWN N N
X4-7C
X2-4C
X3-5A , BLACK
X2-5A , BLACK P P
X3-4A , BROWN Q Q
X2-5C
X3-4C
X3-5A , BLACK R R
X4-5A , BROWN S S
X3-5C
X4-5C
X4-6A , BLACK T T
X4-8A , BROWN U U
X4-6C
X4-8C
X4-9A , BLACK V V
X4-9C
X4-3A , GREEN/YELLOW
X4-12A , GREEN/YELLOW
X4-1A , BLUE
X4-10A , BLUE
X4-2A , BROWN
X4-11A , BROWN
X4-4A , BROWN
X4-7A , BLUE
X4-5A , BROWN
X4-6A , BLACK
X4-8A , BROWN
X4-9A , BLACK
S1
2
3
ABS3-B2
RR SENSOR AND PMV CONNECTORS
1
2
ABS6-B2
X5-6A , BLACK
X5-8A , BROWN
ABS7-B2
X4-4C
1
X4-7C
2
X1-12-5A
1
X5-1C
X5-10C
X5-1C
X5-10C
2
X5-2A , BROWN Z Z X5-2C
X5-11A , BROWN A1 A1 X5-11C
X5-2C
X5-11C
4
X5-5A , BROWN B1 B1 X5-5C
X5-6A , BLACK C1 C1 X5-6C
X5-5C
X5-6C
6
X5-8A , BROWN D1 D1 X5-8C
X5-9A , BLACK E1 E1 X5-9C
X5-8C
X5-9C
8
X5-1A , BLUE X X
X5-10A , BLUE Y Y
ATC CONNECTOR
(OPTION)
ABS11-B2
W W
X4-14C
G1 G1 X4-15C
1
ABS5-B2
2
1
ABS8-B2
X1-12-2A
2
X4-2C
X4-1C
ABS4-B2 3
LF SENSOR AND PMV CONNECTORS
X4-5C
1
X2-1C
X1-12-4A
2
X2-2C
X4-14C
X4-15C
X4-6C
X5-11A , BROWN
X5-5A , BROWN
3
ABS10-B2
X2-4C
X5-10A , BLUE
X5-2A , BROWN
2
X4-11C
X4-4C
F1 F1
X5-3A , GREEN/YELLOW
X5-12A , GREEN/YELLOW
X5-1A , BLUE
1
X1-12-6A
X1-12-2A
X1-12-3A
X1-12-4A
X1-12-5A
X2-1C
X3-7C
X2-5C
ABS
ECU
GND-AA, GREEN/YELLOW A A
GND-BB, GREEN/YELLOW B B
X2-1A , BLUE
X2-2A , BROWN
X3-7A , BLUE
X3-8A , BROWN
1
21
21
3
ABS10-A
X1-14A , PURPLE
2
11
X4-10C
X4-11C
LIGHT
BAR 20
9
X1-12-3A
X1-18A , VIOLET/BROWN
X1-13A , WHITE
12
X4-9C
X1-17A , BLACK/LtGREEN
X1-18A , VIOLET/BROWN
X1-16-1A , ORANGE/PURPLE
X1-17A , BLACK/LtGREEN
WARNING
LAMP
BAR
X4-8C
X1-11A , BLACK
X1-12A , BLACK
X1-8A , ORANGE
X1-9A , ORANGE
X3-4C
X3-5C
X1-9A , ORANGE
X1-10A , BLACK
X3-7C
X3-8C
X1-6-1A , ORANGE/PURPLE
X1-7A , RED
X1-8A , ORANGE
ABS1-A
X1-16-2 , ORANGE/PURPLE 8
5
253-1K , LtBLUE
X1-12-1A
SH 4
SH 4
4
8 10
239-3K, BLACK
239-2H , BLACK
1
6
5B
ABS
SWITCH
3
X1-6-2 , ORANGE/PURPLE
7
2B
A
3
1
2
X1-12-6A
ABS9-B2
LR SENSOR AND PMV CONNECTORS
3
5
6-CHANNEL CONNECTOR
(OPTIONAL)
7
9
10
11
12
ABS HI
X5-9A , BLACK
PD8C3417.FRM
37
Model 387 Schematics (38 of 59)
SK30218
A
38
CAB
LOAD
CENTER
OUTLET
1
CAB54
1
CAB33
1
CAB35
1
CAB36
1
239-44 , BLACK
4
280-2A, ORANGE
239-45 , BLACK
280-1A, ORANGE
2
CAB CIGAR LIGHTER/POWER CONNECTION
PD8C3417.FRM
CAB34
Model 387 Schematics (39 of 59)
SK30218
A
S7
S6
239-37 , BLACK
253-16 , LtBLUE
226-14 , RED
239-35 , BLACK
S5
SPARE
SPARE "A"
SPARE "B"
PD8C3417.FRM
39
Model 387 Schematics (40 of 59)
SK30218
A
WARNING LAMP BAR
17
9
17
9
LIGHT BAR
CAB LOAD CENTER
CAB
FIREWALL
CAB
PANEL
SPARE-1A, GRAY/BLACK
226-10A , RED
S7
S6
CAB23 A B C D
INTER
AXLE
A B C D
FIFTH
WHEEL
253-15 , LtBLUE
239-36 , BLACK
SPARE, GRAY/BLACK
253-13 , LtBLUE
239-34 , BLACK
226-13 , RED
CAB24
192-1 , ORANGE/BLACK
253-12 , LtBLUE
145-1 , WHITE/RED
239-33 , BLACK
226-12 , RED
253-11 , LtBLUE
A B C D
TWO SPEED
AXLE
CAB25
DIFF LOCK/
PTO
1
1
SPARE-1, WHITE
CHASS13
239-32 , BLACK
226-11 , RED
SPARE-A
, GRAY/BLACK
CLC3
CHASS1
A90-1, YELLOW/BLUE
S5
1
TWO SPEED AXLE/INTER AXLE/
FIFTH WHEEL/DIFF LOCK/PTO
SPARE
PD8C3417.FRM
40
Model 387 Schematics (41 of 59)
SK30218
CLC12
517-1 , RED/GREEN
519-1 , LtGREEN/BLUE
520-1 , LtGREEN/PINK
518-1 , BLACK/PINK
7
CUMMINS 6
ENGINE
5
ECU
19
41
CUMMINS
OEM
ENGINE
HARNESS
ECU
31
A
567-1A , RED/GREEN
568-1A , LtGREEN/BLUE
569-1A , LtGREEN/PINK
457-5 , BLACK
10
12
11
9
FW7
567-1 , RED/GREEN
568-1 , LtGREEN/BLUE
569-1 , LtGREEN/PINK
457-1 , BLACK
C C
A
A
D D
B
LOW
COOLANT
PROBE
B
CATERPILLAR
ENG2A
2
CAT
ENGINE
ECU
54
49
18
567-1B , RED/GREEN
568-1B , LtGREEN/BLUE
569-1B , LtGREEN/PINK
457-2A , BLACK
457-4A , BLACK
S3
CLC2-B
ENG3-C
B5 B5
FW7-A
CLC12-B FW1-B
567-1C , RED/GREEN
C1 C1 568-1C , LtGREEN/BLUE
C2 C2 569-1C , LtGREEN/PINK
C3 C3
457-5B , BLACK
10 10
12 12
11 11
9
9
567-1D , RED/GREEN
568-1D , LtGREEN/BLUE
569-1D , LtGREEN/PINK
457-1C , BLACK
C
A
D
B
LOW COOLANT
PD8C3417.FRM
LOW
COOLANT
PROBE
Model 387 Schematics (42 of 59)
SK30218
A
ENG18-B
C
ENGINE
CATERPILLAR
ECU
680-1 , RED
679-1 , YELLOW
239-9H, BLACK
A
B
S2
ENG20
ENGINE
CUMMINS
ECU
OEM HARNESS
8
9
11
680-1A, RED
679-1A , YELLOW
RTN-1, BLACK/RED
A
B
C
EATON TOP 2 TRANSMISSION
PD8C3417.FRM
42
Model 387 Schematics (43 of 59)
SK30218
574-2 , TAN/LtBLUE
574-1 , TAN/LtBLUE
573-2 , TAN/LtBLUE
665-1A , BLUE/TAN
573-1 , LtBLUE/TAN
665-1 , BLUE/TAN
A
43
574-1B , TAN/LtBLUE
302-2 , BROWN/YELLOW
S4
302-3 , BROWN/YELLOW
S5
302-1A , BROWN/YELLOW
S3
S1
S2
S2
573-1B , TAN/LtBLUE
665-1B , WHITE/TAN
239-2L , BLACK
S2
1
2
3
4
7
6
5
DOOR10-L
A
B
C
DORR3-L
A
B
302-4 , BROWN/YELLOW
239-5X , BLACK
253-4CC, LtBLUE
239-6T , BLACK
230-5B , ORANGE
302-1C, BROWN/YELLOW
239-7E , BLACK
302-1 , BROWN/YEL
665-3 , WHITE/TAN
573-1A , WHITE/ORANGE
574-1A , GRAY/VIOLET
226-2B , RED
239-2K , BLACK
665-2 , TAN/TAN
S8
C
B
DOOR3-R
A
M
M
RH MIRROR
MIRROR HEAT
HEATED MIRROR SWITCH
DOOR11-L
7
M
9
1
6
5B 4
LH MIRROR
MIRROR HEAT
8 10
GREEN
7
1
LT GREEN/YELLOW
BLACK
4
LT GREEN/BLACK 5
663-1 , LTBLUE/TAN
663-2 , LTBLUE/TAN
253-1AZ , LTBLUE
6
239-1AZ , BLACK
LT
GREEN BROWN
2
3
1 MT4
MIRROR
1 MT6
239-2BZ, BLACK
253-2AX, LTBLUE
GREEN/RED
A
DOOR5-R
2B 3
M
B
2
1 MT5
BACKLIGHTING
GLARESTOPPER SWITCH
7
MIRROR SWITCH
226 , RED
1 MT1
1 MT3
CAB SPARE POWER MIRROR
9
2B 3
1
6
5B
MIRROR CONTROL/HEATER/GLARESTOPPER
4
8 10
GLARESTOPPER OPTIONAL
PD8C3417.FRM
Model 387 Schematics (44 of 59)
SK30218
A
44
646-1 , BLACK
532-1 , PINK/GREEN
530-1 , YELLOW
CUMMINS
ENGINE
ECU
ENG5
EE28-1 , GREEN
529-1 , BLUE
647-2 , GREEN/BLACK
646-2 , BLACK
531-1 , PINK
S1
EE01-3 , BLACK/WHITE
EE28-1 , GREEN
EE01-4 , BLACK/WHITE
EE01-4 , BLACK/WHITE
EE05-1 , LtGREEN/BLACK
B226-1 , RED/BLUE
239-6E , BLACK
466-1 , WHITE/RED
462-1 , YELLOW
457-8 , BLACK
3
2B
5B
239-5G , BLACK
253-4A , LtBLUE
B226-1 , RED/BLUE
EE11-1 , GREEN/WHITE
EE16-1 , BLUE
9
1
6
ENGINE BRAKE
ON/OFF SWITCH
4
8 10
457-7 , BLACK
7
463-1 , PINK
225-1 , LtGREEN/BLACK
EE05-1 , LtGREEN/BLACK
EE06-1 , YELLOW/BLACK
EE04-1 , LtGREEN/YELLOW
EE04-1 , LtGREEN/YELLOW
239-4J , BLACK
EE08-1 , BLUE
253-3C , LtBLUE
EE17-1 , YELLOW
ENGINE BRAKE
SELECTOR SWITCH
5B 4
EE07-1, PINK
EE17-1, YELLOW
239-4AA, BLACK
EE01-5, BLACK
253-2Q, LtBLUE
226-2C, RED
SH 52
EE01-6, BLACK/WHITE
EE08-1 , BLUE
SH 53
239-3FF , BLACK
A226-1 , RED/BLUE
253-2P , LtBLUE
253-1U , LtBLUE
A226-1 , RED/BLUE
239-1HH , BLACK
SH 52
SH 52
EE11-1 , GREEN/WHITE
226-1H , RED
EE16-1, BLUE
EE01-7 , BLACK/WHITE
SH 53
SH 52
A
239-7N, BLACK
EE15-1 , LtGREEN
253-5B , LtBLUE
NEUTRAL
SWITCH
239-2GG, BLACK
239-2HH, BLACK
SH 53
1
6
8 10
SH 53
SH 53
SH 53
9
2B 3
EE07-1 , PINK
A508-1 , BLUE
465-1 , GREEN
ENG17-B
B
ENG
7
239-13J , BLACK
CAT
ENGINE
ECU
461-1 , BLUE
224-1 , LtGREEN/YELLOW
7
AEE02-1 , BLACK/LtGREEN
226-2C , RED
S4
CLUTCH
SWITCH
1
EE01-1 , BLACK/WHITE
648-1 , LtGREEN/BLACK
534-1 , GREEN
457-1A , BLACK
1
ENG6
647-1 , LtGREEN/YELLOW
S2
A509-1 , BLUE
NOT USED
9
CAB
LOAD CENTER
2B 3
7
9
2B 3
1
7
1
1
6
6
5B 4
5B 4
8 10
8 10
DIAGNOSTIC
SWITCH
CRUISE
ON/OFF SWITCH
9
2B 3
6
5B
4
8 10
CRUISE
SET/RESUME SWITCH
ENGINE BRAKE/CRUISE CONTROL/DIAGNOSTIC
PD8C3417.FRM
CAB
LOAD
CENTER
RAD_2A
RAD_1A RAD_2
D
D
C
C
B
B
A
A
435-1 ,
431-1 ,
434-1 ,
430-1 ,
RMT_1
REMOTE
1
FRONT
SPEAKER
RADIO/CB
RAD_3B
GREEN/BLACK
GREEN
WHITE/BLACK
WHITE
RMT D5A H5A G5A F5A E5A C5A A5A B5A D4A C4A B4A A4A
432-1 , GRAY
436-1 , GRAY/BLACK
433-1 , VIOLET
437-1 , VIOLET/BLACK
RAD_1
D
C
B
A
RAD_4
D
C
B
A
RAD_4A
A
A
B
C
B
C
D
D
B
A
REAR_SPKR_POS-B
, WHITE
REAR_SPKR_NET-B
, BLACK
A
FR_SPKR_POS-B
, WHITE
FR_SPKR_NEG-B
, BLACK
B
GREEN
GREEN/BLACK
VIOLET
VIOLET/BLACK
REAR
SPEAKER
431-1 ,
435-1 ,
433-1 ,
437-1 ,
A
19-1F , VIOLET/WHITE
239-1B , BLACK
A252-1A , RED
B
430-1 , WHITE
434-1 , WHITE/BLACK
432-1 , GRAY
436-1 , GRAY/BLACK
19-1F , VIOLET/WHITE
239-1B , BLACK
A252-1A , RED
RAD_3A
WHITE
WHITE/BLACK
GRAY
GRAY/BLACK
YELLOW
BLACK
RED
GREEN
GREEN/BLACK
VIOLET
VIOLET/BLACK
BLUE
FRONT
SPEAKER
REAR_SPKR_POS-A
, WHITE
REAR_SPKR_NEG-A
, BLACK
FR_SPKR_POS-A
, WHITE
FR_SPKR_NEG-A
, BLACK
Model 387 Schematics (45 of 59)
SK30218
A
REAR
SPEAKER
B
A
RAD_2B
RAD_1B
B-PILLAR
FLOOR
GROUND
RAD_P1
ANTENNA
RADIO
RADIO
PD8C3417.FRM
45
Model 387 Schematics (46 of 59)
MAIN
POWER
3
298-8A , ORANGE
2
304-9C , RED
239-32C , BLACK
1
SK30218
A
46
S4
304-1D , RED
SLPR31
298-6D , ORANGE
SLEEPER
LOAD
CENTER
16
86-1 30-1
85-2 87-2 87A-2
85-1 87-1 87A-1
286-1C , RED
B252-1 , RED/BLACK
239-29, BLACK
239-34, BLACK
SLEEPER 2
86-2 30-2
22
17
23
18
24
19
25
20
26
252-2B , RED
252-1B , RED
A252-1B , RED
A252-2B , RED
226-3H , RED
BAT_1
BAT_2
3_IGN 4_IGN
5_ACC 6_ACC
27
28
S3
29
30
31
298-1E , ORANGE
SH 3
239-16G , BLACK
SH 4
32
230-1H , ORANGE
230-2F , ORANGE
262-2 , RED
33
7
SLPR7
S2
34
35
36
37
38
305-6A , RED
304-7C , RED
298-5D , ORANGE
298-4C , ORANGE
239-17E , BLACK
239-19, BLACK
S2
298-2C , ORANGE
SPARE POWER SYSTEM EXPANSION SLEEPER
PD8C3417.FRM
Model 387 Schematics (47 of 59)
SK30218
464-1A, WHITE
INTERUPTER
OPTION
577-2 , BLACK
577-1A, BLACK
455-1 , RED
576-2 , ORANGE
455-1A, RED
1
1
455-1B, RED
455-2A, RED
THROTTLE
PEDAL
CAT
A
SPEED
B SENSOR
ENG13-B
EE14-2, BLUE
S1
30-4A,
30-3A,
30-1B,
533-1A,
ORANGE
ORANGE
ORANGE
WHITE
239-2NN, BLACK
239-5Y, BLACK
239-3KK, BLACK
239-4CC, BLACK
239-1PP, BLACK
EE01-2, BLACK/WHITE
F
E
D
E22-1, PINK
EE24-1, LtGREEN
EE16-2, WHITE/RED
EE10-1, BROWN/WHITE
CUMMINS
S6
POWER
C
A
B
D
B
C
A
E
F
ENG_3
THROTTLE
PEDAL
CUMMINS
S5
SH 5
S4
S4
457-4B, BLACK
1
ENG13-A
239-14G, BLACK
239-15J , BLACK
30-7A, ORANGE
30-6A, ORANGE
576-1 , ORANGE
576-2 , ORANGE
577-1A, BLACK
577-2 , BLACK
BLACK
BLACK
ORANGE
ORANGE
576-1B , ORANGE
576-2A , ORANGE
577-1B , BLACK
577-2A, BLACK
SH 5
SH 5
SH 5
SH 5
21
22
S2
S2
5
ENGINE
STOP
4
2
525-1 , BLUE/RED
526-1 , BLUE/ORANGE
A
B
SPEED
SENSOR
ENG
CAB LOAD CENTER
16
33
15
A281-2A, WHITE
OEM HARNESS
3
SH 10
16
33
15
STOP
ENGINE
CHECK
ENGINE WARNING ENGINE
CUMMINS
LIGHT BAR
533-1 , WHITE
BLUE
RED
ORANGE
ORANGE
B
3-3 , WHITE
499-1 ,
A23-1 ,
30-5A,
30-2A,
EE01-8, BLACK/WHITE
EE14-1, BLUE
EE13-1, RED/ORANGE
EE23-1, GREEN/BLUE
EE12-1, BLACK/RED
577-1C,
577-2B,
30-2B ,
576-1A ,
ENGINE
ECU
CUMMINS
PINK/BLUE
YELLOW/BLUE
BLACK/BLUE
RED/ORANGE
SIGNAL
A
C
EE13-2, RED/ORANGE
516-1 ,
515-1 ,
500-1 ,
498-1 ,
RETURN
ENG13
458-1 , BLUE
533-1A , WHITE
457-5C , BLACK
ORANGE
BLUE/RED
BLUE/ORANGE
RED/ORANGE
455-2 , RED
464-1 , WHITE
576-1 ,
197-1 ,
198-1 ,
582-1 ,
SH 5
CAB61 CAB60
464-1A , WHITE
ENGINE
ECU
CAT
A
S3
CATERPILLAR CUMMINS ENGINE
ECU/TPS/SPEED/SENSOR/INTERUPT/WARNING LAMPS
PD8C3417.FRM
47
Model 387 Schematics (48 of 59)
SK30218
SPEEDOMETER
MESSAGE
CENTER
MESSAGE
1
2
A
CAB44
SH 53
SH 53
239-53C , BLACK
669, WHITE
670, LtGREEN
239-54D , BLACK
239-52B , BLACK
239-51B , BLACK
253-23C , LtBLUE
253-22A , LtBLUE
253-21A , LtBLUE
SH 52
SH 52
SMC SELECT/RESET
7
9
2B
3
1
6
5B
4
8
10
SPEEDO MESSAGE CENTER (SMC)
PD8C3417.FRM
48
ABS ECU
DATA LINK
A
SH 35
B
C
ECU AUTO
SHIFT XMSN
661-1E , YELLOW
662-1E , GREEN
663-1E , NONE
BB2
C
B
A
C
B
A
BB4
663-1F , NONE
662-1F , GREEN
661-1F , YELLOW
B
B
B
DIAGNOSTIC
INTERFACE
CONNECTION
A
C
C
A B C
C
C
B C
B
A
A
B
A
A
B
A B
C
C
C
S4
B
S3
661-1G, YELLOW
662-1G , GREEN
663-1G, NONE
BB1
HDA3
B
C
J1939
A B
C
B
C
C
239-2N , BLACK
230-2B , ORANGE
417-2A , PURPLE
418-2A , WHITE
S2
A
S1
A
B
A
B
A
C
A
C
239-1Q, BLACK
230-1D, ORANGE
417-1E, PURPLE
418-1E , WHITE
660-1 , NONE
662-1 , GREEN
661-1 , YELLOW
C
B
B
DATA LINK
CONNECTION
CENTER
661-1A, YELLOW
662-1A , GREEN
663-1A , NONE
B
A
A
ABS8
A
C
2
"A"
REMOVE RESISTOR
AUTO SHIFT
ENG19
C
1
C
B
SH 35
A
ENG4 ADD
C
B
ABS10
ENG2
2
B
B
A
B
B
1
A
A
A
INTERFACE
MODULE
A
239-63 ,
230-7A ,
417-3A,
418-3A ,
661 , NONE
662, GREEN
663 , YELLOW
ECU
ENGINE
C
A
CAB18
S10
BLACK
ORANGE
PURPLE
WHITE
239-64 , BLACK
230-8A , ORANGE
417-4A , PURPLE
418-4A , PURPLE
CAB
LOAD
CENTER
B
DMC4
B
551-1 , BLUE/WHITE
552-1 , WHITE/BLUE
417-1F , PURPLE
418-1F , WHITE
417-2 , PURPLE
418-2 , WHITE
417-1B, PURPLE
418-1B , WHITE
CAB PANEL
A
A
EE33-1 , BLUE/WHITE
EE35-1, WHITE/BLUE
417-1G, PURPLE
418-1G, WHITE
417-1A, PURPLE
418-1A , WHITE
CAB FIREWALL
X1-14, PURPLE
X1-13, WHITE
X1-3, ORANGE
X1-1, ORANGE/BLACK
417-1C, PURPLE
418-1C, WHITE
417-1 , PURPLE
418-1 , WHITE
Model 387 Schematics (49 of 59)
SK30218
A
A
S15
S14
A
C
B
A
B
C
B
A
B
C
A
B
C
S12
660, NONE
662A, GREEN
661A, YELLOW
49
CAB FIREWALL
C
3 WAY
J1939
JUNCTION
TERMINATION
RESISTOR
USED AT OPEN NODES
663-1A , NONE
662-1A , GREEN
661-1A , YELLOW
ABS8-A
ABS ECU
BB3
C
A
CONNECTS TO "A"
OPTIONAL AUTO SHIFT
PD8C3417.FRM
Model 387 Schematics (50 of 59)
SH 5
SK30218
B522-1 , RED/BLACK
1
86-1 30-1
85-1 87-1 87A-1
SH 5
B252-1C , RED/BLACK
3
4
5
6
RED
RED
RED
RED
22
23
24
25
26
27
28
29
30
31
32
33
38
39
A252-3 , RED
A252-2 , RED
A252-1 , RED
239-7F , BLACK
ACCESSORY
RELAY
2
252-1 ,
226-9 ,
226-8 ,
226-7 ,
7
SPARE CONNECTIONS
50
S4
SPARE FUSE
POSITION
304-10 ,
304-9 ,
304-8 ,
252-4 ,
252-3 ,
252-2 ,
A
RED
RED
RED
RED
RED
RED
226-6A , RED
226-5B , RED
226-4B , RED
8
86-2 30-2
9
10
11
12
85-2 87-287A-2
34
35
36
37
SPARE FUSE
POSITION
14
40
41
42
43
44
45
SPARE CONNECTIONS
286-1D , RED
86-3
304-7 ,
304-6 ,
304-5 ,
304-4 ,
304-3A ,
304-2 ,
RED
RED
RED
RED
RED
RED
CAB39
298-11 , ORANGE
304-11 , RED
252-5 , RED
239-48 , RED
.
S3
230-6 , ORANGE
230-5 , ORANGE
230-4A , ORANGE
15
16
17
18
19
20
46
47
48
49
50
2
3
MAIN
POWER
4
SPARE FUSE
POSITION
21
52
SPARE CONNECTIONS
CAB2
1
51
230-1E , ORANGE
230-2C , ORANGE
230-3B , ORANGE
239-2P , BLACK
239-3L , BLACK
239-4K , BLACK
85-3
239-JA , BLACK
87-3
298-10 , ORANGE
304-1 , RED
298-9 , ORANGE
SH 5
13
226-1J , RED
226-2D , RED
226-3D , RED
IGNITION
RELAY
53
54
55
56
57
298-2 , ORANGE
298-3 , ORANGE
298-4 , ORANGE
298-5A , ORANGE
298-6 , ORANGE
298-7 , ORANGE
S2
298-1A , ORANGE
SH 5
S1
239-1R , BLACK
SH 4
CAB SPARE POWER SYSTEM EXPANSION
PD8C3417.FRM
CAB LOAD
CENTER
Model 387 Schematics (51 of 59)
SK30218
A252-2A , RED
239-2CC, BLACK
RADIO/
CB
HEADER
CBSP-1, WHITE/GRAY
A
CBSP-2, BROWN/GRAY
B
RED
BLACK
BROWN/GRAY
WHITE/GRAY
CB RADIO
LH
ANTENNA
51
HDR10
A252-2A , RED
239-2CC, BLACK
CBSP-2A, BROWN/GRAY
CBSP-1A, WHITE/GRAY
CBSP-2A, BROWN/GRAY
CBSP-1A, WHITE/GRAY
CAB
LOAD
CENTER
A
RH
ANTENNA
CB RADIO
PD8C3417.FRM
CB
SPEAKER
Model 387 Schematics (52 of 59)
SK30218
A
52
CAB LOAD CENTER
CAB14
CAB PANEL
10
7
25 PIN
SLEEPER
1
253-1P
253-24A
21
CAB53 CAB15
37 PIN
HVACCAB
FIREWALL RADIO/CB ENGINE DOOR PWR LIGHT BAR
7
C7
2
9
5
30
C8 4
HTD
MIRROR
SW
CAB30
FLOOR LP
SWITCH
10
8
S1
9
15
CAB4310
SMC
SELECT/RESET
SWITCH
253-3E
253-3G
253-3H
253-4D
253-10C
6
6
4
2
G
DOOR4
RH POWER
WINDOW
DOOR6
DOOR
LOCK
DOOR4
DOOR5
RH POWER
WINDOW
DOOR6
LH POWER
WINDOW
DOOR
LOCK
9
9
SLPR14
SLPR27
SLPR17
HVAC CONTROLREFER SWITCH FL LP SWITCH
ON/OFF
HEAD
SLEEPER
9
ENG10
ENG9
ENG8
ENG7
ENG12
CRUISE
ON/OFF
SWITCH
CRUISE
ENGINE BRAKEENGINE BRAKEDIAGNOSTIC
SET/RESUME SELECTOR
ON/OFF
SWITCH
SWITCH
SWITCH
SWITCH
9
CAB11
CAB12
CAB13
CAB11
HEAD LAMP
SWITCH
CLEARANCE
LP-SWITCH
PASS SIGNAL FOG LP
SWITCH
SWITCH
CAB16
253-13A
9
253-7A
9
CAB17
253-8A
9
CAB20
ENGINE
SPOT LP
FAN SWITCH SWITCH
CAB25
253-9B
9
9
CAB21
CAB22
EITHER
SWITCH
SLEEPER
LP SWITCH
BACK LIGHTING +12 VOLTS
253-15A
9
INNER AXLE
SWITCH
253-25
CIGAR
LIGHTER
POWER
9
253-5
CAB24
253-10C
253-2E, LtBLUE
DMC5
9
253-4B
9
CAB23
9
9
253-3D
DIFF LOCK
SWITCH
253-12A
253-5
9
9
SH 35
253-4
9
253-2G
253-1J , LtBLUE
1
253-3
CAB28
TWO SPEED
AXLE SWITCH
S6
253-2
9
253-16A
253-2H
6
253-2K
S4
253-1
CAB37
CIGAR
LIGHTER
POWER
CAB30
SLEEP L/C
SLPR2
253-11A
1
9
1
LIGHT BAR
253-21
CAB38
DMC6
253-18
PIN
30
DOOR4
DOOR4
253-1N
253-20A
WHT
RED
253-19
PIN
8
DOOR6
253-22
253-23
9
DOOR3
DOOR3
8
PANEL
LP
DIMMER
CONTROL
253-3F
253-4C
8
HVAC CNTRL
HEAD
253-1R
1 2 3
G
253-1Q
1 2 3 CAB19
253-2J
253-1M
253-6
13-1
S3
FIFTH WHEEL
SW SWITCH
253-14
9
CAB26
SPARE SWITCH
9
CAB27
DIFF LOCK
PTO SWITCH
A
CAB62
ASHTRAY
PD8C3417.FRM
9
CAB45
LOAD LP
SWITCH
Model 387 Schematics (53 of 59)
SK30218
CAB 2
1
CAB10
65
CAB1
1
CAB36
1
CAB35
8
CAB31
LH FLOOR LAMP
C CAB48
HVAC CONTROL
HEAD
239-56C, BLACK
8
CAB32
D
CAB52
AC MODULE
C
CAB50
HVAC CONTROL HEAD
239-57A , BLACK
8 7 2
D
SH 4
RHFLOORLAMP
8 7 2
CAB43
CAB47
HVAC CONTROL
HEAD
239-55B , BLACK
239-54B , BLACK
2
CAB46
HVAC CONTROL
HEAD
239-42A , BLACK
7 8
CAB30
FLOORLAMP
SWITCH
239-44A , BLACK
4
CAB39
239-59A , BLACK
S8
239-41A , BLACK
239-43A , BLACK
239-39A , BLACK
239-40A , BLACK
239-60A , BLACK
239-52 , BLACK
239-53 , BLACK
239-62A , BLACK
CAB
FIREWALL
12
239-45A , BLACK
239-46A , BLACK
239-47B , BLACK
239-48B , BLACK
239-3DD, BLACK
239-4Y, BLACK
CAB45
SELECT/RESET SWITCH
LOAD LAMPSWITCH
CABLOADCTR WIPER SWITCH PASSTHRU
CAB16
FOGLAMP SWITCH
8 7 3
7
CAB21
CAB17
ENGINEFANSWITCH
CAB20
STOP LAMP SWITCH
239-51 , BLACK
239-38A , BLACK
239-29B , BLACK
239-28A, BLACK
CAB13
PASS SIGNAL SWITCH
239-25D, BLACK
239-26C, BLACK
239-27B, BLACK
CAB12
CLEARANCE LAMPSWITCH
8 7
239-22C, BLACK
239-19B, BLACK
239-20B, BLACK
8 7 3
239-21A, BLACK
239-15F , BLACK
239-16D, BLACK
239-17C, BLACK
239-18C, BLACK
8 7 3 5
239-23A , BLACK
CAB11
239-13F , BLACK
239-14F , BLACK
WIRE1724, BLACK
8 7 3
HEADLAMP SWITCH
8 7 3 5
239-12K, BLACK
239-9J , BLACK
239-10H, BLACK
239-8R, BLACK
B
C
CAB14
CAB LOAD
CENTER
3
239-37A , BLACK
239-2DD, BLACK
OUTLET
4
2 3 5
7
14
21
EITHERSWITCH
PARK BRAKESWITCH
DIFF/LOCK/PTOSWITCH
239-50A, BLACK
239-32B, BLACK
C
A
CAB23
S5
CAB41
RHDOORSWITCH
TWOSPEEDAXLESWITCH
239-51A , BLACK
239-30A , BLACK
7
CAB29
CAB28
CAB22
SLEEPERFLOOR
LAMPSWITCH
239-33A , BLACK
HDA1
239-2EE, BLACK
E
A
HDA2
CAB25
SPARESWITCH
239-35A , BLACK
C
8 7 2
CAB26
13
CAB15
CAB LOADCENTER
239-1GG, BLACK
1
ENG11
CAB LOADCENTER
CAB43
SELECT/RESETSWITCH
SPARESWITCH
239-3EE, BLACK
8 7
ENG10
CRUISEON/OFFSW
239-4Z , BLACK
7
ENG9
SET/RESUMESWITCH
239-5W, BLACK
7
ENG8
ENGBRAKE SELECTOR SW
239-36A, BLACK
C
239-7P, BLACK
8 7
ENG7
ENGINEBRAKEON/
7
ENG12
A
CAB27
CAB42
SPARESWITCH
LHDOOR SWITCH
239-65 , BLACK
B
CAB62
ASHTRAY
DIAGNOSTICSWITCH
PD8C3417.FRM
239-55C, BLACK
239-53B , BLACK
C
239-54C, BLACK
DIAGNOSTIC CONNECTION
239-34A , BLACK
NEGATIVE SWITCH LINKS
239-6Q, BLACK
E
CAB56
239-2FF , BLACK
239-63A , BLACK
239-52A , BLACK
239-53A , BLACK
CAB24
S10
239-49A , BLACK
C
INTERAXLESWITCH
239-64A , BLACK
239-6P , BLACK
86-2
85-3
239-8P , BLACK
86-2
86-1
HVAC
CAB
CAB
LOAD CENTER LOAD CENTER
CAB54
CAB15
239-58A , BLACK
239-1FF , BLACK
LOAD CENTER
CAB53
S1
CABLOADCENTER
53
CAB
SH 4
239-5V, BLACK
A
8 7 2
CAB45
LOADLAMPSWITCH
Model 387 Schematics (54 of 59)
(GREEN/BLACK)
SH 10
227-3A
LOAD CENTER
CHASSIS
S6
SH 10
227-2B
227-4A
SH 10
SH 10
227-1F
227-5A
SH 13
SK30218
SH 50
252-1A
SH 50
252-2A
SH 50
252-3A
(RED)
252-4A
S4
253-5A
(YELLOW/BLACK)
SH 13
228-5A
S5
SH 10
SH 10
228-4A
228-2B
228-3A
228-1F
SEE GROUND
DISTRIBUTION
SHEET
SH 47
557-2
SH 17
239-11E
SH 4
239-1S
S2
SH 10
SH 10
(BLACK)
577-1
SH 47
239-17
SH 4
239-15B
SH 4
SH 4
239-10D
239-3N
SH 22
SH 3
239-6G
239-4L
SH 4
SH 13
A239-LH
SH 12
8-5C
SH 12
8-1D
SH 12
8-2C
SH 6
SH 6
SH 40
SH 50
SH 50
SH 50
SH 50
(RED)
397-2
SH 6
226-11A
(RED)
226-12A
SH 40
226-13A
SH 40
226-14A
SH 39
SH 50
230-7
(ORANGE)
S12
SH 49
230-8
(BLACK)
239-47A
239-1T
SH 50
239-2Q
SH 50
239-3P
SH 50
239-4M
SH 5
239-48A
SH 50
239-5J
SH 50
SH 25
239-49B
(BLACK)
239-38B
239-50B
239-34B
SH 52
253-14A
SH 52
253-11B
SH 52
253-16B
SH 39
(ORANGE)
298-3A
SH 50
SH 50
298-5B
298-11A
298-2A
298-9A
298-6A
SH 50
298-7A
SH 50
(RED)
304-4A
SH 50
304-5A
SH 50
304-10A
SH 50
304-11A
304-7A
SH 50
SH 50
304-2A
304-8A
SH 50
304-9A
SH 50
S3
304-6B
304-3B
SH 49
239-64B
SH 25
329-1C
(BLACK)
S10
239-63B
SH 9
342-1A
342-2A
239-35B
SH 39
239-32D
239-36B
SH 40
SH 40
239-33D
239-37B
SH 39
SH 48
239-51C
S5
SH 39
SH 13
239-6H
SH 12
239-7G
SH 13
239-10E
SH 12
239-9D
SH 14
SH 9
342-3A
SH 49
417-3
418-3
570-2A
SH 21
FRL-1A
SH 21
FRL-4A
SH 21
239-42B
SH 21
239-43B
SH 12
SH 16
SH 23
SH 14
239-8F
SH 25
SH 9
SH 49
SH 49
(BLACK)
S3
(PURPLE)
SH 14
7-1B
7-2C
SH 14
(BROWN)
8-1E
SH 12
8-2D
SH 12
(BROWN)
8-5D
SH 12
8-6A
SH 12
S4
8-4D
230-1F
SH 43
230-5A
SH 24
239-3S
SH 24
239-4P
SH 43
239-6J
SH 43
253-4F
SH 23
253-2S
SH 43
S8
SH 4
(BLACK)
239-35
S5
SH 34
239-18A
SH 46
239-19
SH 46
298-1C
SH 46
298-2B
SH 46
298-4B
SH 46
304-9B
SH 46
239-32A
SH 46
SH 46
298-6B
298-8
(RED)
304-1B
S4
304-3C
SH 23
253-1V
SH 23
S4
304-7B
SH 4
S2
(BLACK)
239-4Q
SH 17
S1
(BLACK)
239-6K
SH 17
S5
(BLACK)
239-15C
SH 6
S3
(BLACK)
239-8H
SH 17
239-13C
SH 46
239-9E
SH 46
SH 46
(BLACK)
S10
239-16B
SH 4
(BLACK)
239-11G
SH 4
239-14C
SH 46
SH 46
SH 43
239-7H
SH 34
305-6
(BROWN/YELLOW)
SH 43
302-1B
CHASSIS HARNESS
(BLACK)
S4
239-1W
SH 34
SH 46
SH 24
(LtBLUE)
253-3B
S3
239-5M
(ORANGE)
SH 46
298-5C
S3
SH 24
SH 24
S2
239-26B
SH 23
(ORANGE)
230-2D
239-2T
239-19
239-34
(BLACK)
239-25B
SH 23
226-3E
230-3C
(BLACK)
S1
239-1V
239-3T
SLEEPER HARNESS
SH 34
302-3A
S2
SH 25
19-2C
(RED)
226-2E
302-2A
S5
(YELLOW/WHITE)
S16
SH 9
570-3A
SH 9
226-1K
SH 24
SH 50
(YELLOW/WHITE)
SH 9
342-4A
S9
SH 2
239-10F
SH 11
269-1B
(PINK/WHITE)
S8
SH 11
269-2A
269-3A
SH 11
(BROWN)
8-2E
SH 12
8-1F
SH 12
(BROWN)
8-4F
SH 12
8-5E
SH 12
ABS CAB
SH 36/37
GND-AAA
SH 36/37
X5-3
(RED/BLACK)
S9
SH 21
FRL-3A
(BLACK)
S8
239-41B
239-4N
239-5K
SH 25
S2
8-3D
239-17A
(WHITE)
S14
418-4
SH 17
S6
SH 46
(PURPLE)
S15
417-4
239-3R
DOOR CONTROL
(VIOLET/WHITE)
S5
SH 25
19-3B
19-1E
S1
7-3C
(PINK/GREEN)
S11
SH 25
329-2C
342-5A
SH 17
239-12C
239-16A
S13
(BLACK)
239-2R
(BLACK)
SH 46
329-3C
SH 40
239-30B
239-1U
239-11F
SH 49
570-4A
SH 40
SH 4
SH 10
SH 50
SH 13
SH 20
239-39B
253-12B
SH 50
SH 9
SH 25
SH 52
304-1A
SH 49
S1
SH 52
253-15B
SH 50
SH 9
SH 49
(LtBLUE)
253-13B
298-4A
298-10A
SH 12
SH 12
SH 50
S7
298-1B
SH 50
S2
SH 13
397-1
226-10
SH 50
SH 13
MAIN CAB HARNESS
SH 40
253-21B
239-14H
8-4C
S7
253-10
SH 52
A239-RH
(BROWN)
S3
8-3C
397-3
SH 52
S6
HOOD HARNESS
SH 50
A
SH 36/37
GND-BA
SH 36/37
X4-12B
S1
(GREEN/YELLOW)
SH 36/37
X3-9B
X4-3B
S2
(GREEN/YELLOW)
SH 36/37
X2-3B
X5-12
8-3F
S6
SH 36/37
SH 36/37
S7
SH 21
SPLICE LOCATION DISTRIBUTION
PD8C3417.FRM
54
Model 387 Schematics (55 of 59)
SK30218
COWL
SH 7
239-3V
SH 6
239-4R
SH 8
239-5P
(BLACK)
S1
239-1X
239-2U
CUMMINS ENGINE
SH 6
SH 47
SH 6
SH 25
DOOR RH
(BLACK)
S2
239-1Y
239-3W
SH 23
SH 43
239-2V
239-4S
SH 24
239-5Q
SH 25
253-1W
253-3M
SH 24
SH 4
239-10G
SH 5
239-13
LOCK2A-1B
SH 47
30-4
SH 47
30-6
226-5C
226-2F
SH 21
226-3F
SH 23
(BLACK)
239-1Z
SH 24
SH 43
239-2W
SH 25
239-3X
239-5R
SH 24
SH 24
239-4T
239-6L
SH 24
239-7K
SH 43
253-1X
253-2U
S4
665-2A
(LtBLUE)
253-3N
SH 24
253-4G
SH 24
(WHITE/TAN)
S2
SH 43
665-1C
665-3A
SH 4
239-4F
SH 5
239-13
S1
239-1DD
239-3BB
SH4
SH 4
S2
239-5T
239-12H
SH 11
SH 55
239-9G
239-6N
SH 9
239-13E
SH 44
SH 8
239-10M
239-7M
SH 11
S4
457-1B
SH 44
457-8A
SH 44
S3
457-5A
SH 47
(BLACK)
S4
239-2X
SH 44
SH 47
(BLACK)
S1
239-7L
239-8K
457-7A
SH 47
SH 4
SH 41
457-4
SH 41
457-2
SH 4
(ORANGE)
S5
SH 47
30-1
SH 47
30-7
(ORANGE)
S6
SH 47
30-2
SH 47
SH 44
ENGINE DASH
(BLACK)
S1
EE01-1A
EE01-3A
SH 44
SH 47
EE01-2A
SH 47 (CAT ONLY)
SH 12
SIDE REPEATER
(BROWN)
S1
8-1G
8-2F
EE01-8A
8-3G
SH 4
SH 4
SH 43
239-2AA
SH 44
30-5
SH 23
(ORANGE)
S3
SH 24
230-1G
S5
SH 47
SH 4
SH 9
239-8J
SH 24
SH 23
SH 23
239-6M
30-3
226-4C
SH 23
SH 4
SH 47
SH 23
230-3D
SH 47
SH 24
(RED)
S1
226-1L
SH 24
CAT ENGINE
SH 47
SH 24
LH DOOR
230-2E
S2
239-11H
239-5S
(BLACK/GRAY)
S3
SH 24
LOCK2A-3A
LOCK2A-2A
SH 24
239-15D
SH 23
(GRAY/BLACK)
S4
LOCK1A-1A
LOCK1A-3A
SH 24
LOCK1A-2A
SH 24
(BLACK)
S3
239-1AA
239-3Y
SH 47
SH 25
239-14E
239-4U
(LtBLUE)
S1
253-2T
A
239-1BB
SH 12
SH 12
(BLACK)
S2
239-2Y
SH 10
239-3Z
SH 10
TRAILER HARNESS 7-WAY
(BLACK)
S1
239-2Z
239-1CC
239-3AA
SH 4
SH 4
SH 43
SPLICE LOCATION
DISTRIBUTION
PD8C3417.FRM
55
Model 387 Schematics (56 of 59)
SK30218
A
S6
253-25A , LtBLUE
239-65A , BLACK
S5
A
B
CAB62
ASH TRAY
ASHTRAY
PD8C3417.FRM
56
Model 387 Schematics (57 of 59)
SK30218
A
57
ICC LIGHT
HDR2 THRU HDR6
DOME LAMPS
HDR7, HDR8, AND HDR9
SPOT LAMPS
HDR12, HDR12
AXLE GROUND AND TEMP
SENSOR CONNECTION
TAIL LAMP
CONNECTION CHASS11
SPARE CIRCUIT
BLOCK CAB2
FIREWALL
CONNECTION CAB1/CLC7
GROUND STUD
FIREWALL CLC 9
RH HEAD LAMP
CONNECTION HOOD 3
ENGINE HARNESS
CONNECTION CLC2/ENG3
SWITCHES ON DASH
CAB 11 THRU CAB 22
LH FUEL TANK CONNECTION HOOD 12
STOP LAMP SWITCH CONNECTION HOOD 14
POWER OUTLET CONNECTION
HOOD HARNESS CONNECTION HOOD 1/CLC1
LH HEAD LAMP CONNECTION HOOD 2
PD8D3417.FRM
Model 387 Schematics (58 of 59)
SK30218
A
READING LAMP
CONNECTION
FL LAMP
CONNECTION
LOAD LAMP
CONNECTION
READING LAMP
CONNECTION
POWER OUTLET
CONTROL PANEL
CONNECTION
BUNK LAMP
CONNECTION
MAIN POWER
CONNECTION
REFRIGERATOR
CONNECTION
SLPR15 OR SLPR16
SPARE CIRCUIT CONNECTION
PD8D3417.FRM
58
Model 387 Schematics (59 of 59)
SK30218
7
A
9
2B 3
1
6
5B 4
8 10
CIRCUIT BREAKER
60 AMPS
HOT LINE SWITCH
6 10 8 9 4
226-1AB , RED
239-1AB , BLACK
383-1 , BLUE
1
1
1A, RED
239-2AB , BLACK
HTL2
383-2 , BLUE
2
2
253-2AB , LtBLUE
1 2 7 3 5
239-3AB , BLACK
253-1AB, LtBLUE
HTL1
CAB SPARE POWER
5 AMPS
HTL3
1
1, RED
SH3
HTL4
1
BACK LIGHTING
239-1AC , BLACK
383-1AB , BLUE
86
30
SOLENOID
239-AE , BLACK
87
85
HTL1-SC1
1
A B
A B
HTL1-SC2
HOT LINE HEATER
383-1AC , BLUE
239-1AD , BLACK
2
CROSS MEMBER
FUEL HOT LINE
PD8D3417.FRM
59