Service Manual
9-13
944E-42
Electrical System
9.6.2 Start & Charge Circuit
MU7540
BAT1P
PB4
PB2
NS2
PB1
NS1
ST4
IG2A
ST1 ST2
BU2
H1 H1A H2 H2A
S1 S2
PB6
PB6A
TR6A
TR7A
S1B
BP1A
S1D
BP1
AW1
12V_BUSSBAR
12V_BUSSBAR
AD1
S5
BU3C
TR9
BU2A
IG2
PB2A
PB2B
CP1
LP1
IG1
PB6B
TR8
TR6
S6
S1A S2A
S2B
PB3 PB3A
S4
S4
PB3B
BA1ABA1
IG2B
TR7
S3
S3
RG4
BU3A BU3BBU3
ST3
AUXILIARY HYDRAULICS
ST4A
AB_FAB
BA2
BA3
BA3A
BA4
BA4B
BA4B
BA4A
FUSE_BOX_BUSSBAR_A
FUSE_BOX_BUSSBAR_A
BATT1-12V
IGN_SW
ACC
IGN
B+
OFF
ACC
IGN
ST
ST
1A
3
PARK_BRAKE_SW
2
ON
ON
OFF
5
6
4
SYMBOL
BAR
7
8
30
87
IR_NO
Y6
M
STARTER
BACKUP_ALARM
30
87A
TCR_NC
HORN
HORN_SW
B
D
W
G
ALT
STAB_BRAKE_SW
1
A
40
AMPS
F1
2
B
15
AMPS
F2
3
C
15
AMPS
F3
PB_F
2
3
PB_F
5
PB_F
6
TRANS
5
TRANS
6
TRANS
8
F
TRANS_BULK
4
D
20
AMPS
F4
5
E
20
AMPS
F5
6
F
10
AMPS
F6
7
G
10
AMPS
F7
1A
PB_F
8
STARTER_SOL
SR_NO
SS_NO
87
30
BAR_NO
3
2
SYMBOL
BAR
7
8
TRANS_CUTOUT_SW
50
TCO_F
2
TCO_F
8
TCO_F
85
86
SLR
E6
BOOM_PROX_SW
85
86
TCR
E1
85
86
LPR
E8
85
86
IR
E2
85
86
CPR
E9
85
86
NSR
E3
87
30
BR_NO
BP_F
A
BP_F
B
sht 2 AW1
sht2AD1
87
30
NSR_NO
sht 1 S5
sht 1 S5
sht 2 BU3C
X10
A
AD5 7
B+ 8
SW1
AD3 3
AD4 1
AD6 6
AD7 5
AD1 2
AD2 4
SW4
SW2
SW3
R
N
F
N
R
F
4
2
3
1
2
3
1
4
TRANS_SHIFTER
SR
40
35
10
15
VP2
C
VP2
B
VP2
A
1A
1A
1A
55
VP1
C
VP1
A
5
sht 1 S4
sht 1 S4
sht 2 PB3B
A
PWR_BULK_3
25
sht 1 S3
sht 1 S3
87
30
TCR_NO
C
PWR_BULK_6
A2
VEH_BULK
A3
VEH_BULK
A5
VEH_BULK
B
PWR_BULK_6
F
PWR_BULK_6
A4
VEH_BULK_F
A
PWR_BULK_6
VP1
F
VP2
F
45
BUA_F
A
HORN_F
1
HORN_F
2
sht 4 GH1P
sht 4 GH2P
sht 4 ST4A
sht 4 BAT2P
A
B
150
AMPS
FUSIBLE_LINK
246
1
247
1
sht 1 BA4B
sht 1 BA4B
sht 2 BA4A
12V_BUSSBAR
BB1 BB1A CP2 CP3
FWJ2
BLB
BLC
FW1
FWP
FW1A
FWJ3
RWP
TWP
TWJTW1
BLP
HVP
POTP
ENCLOSED CAB OPTION
FUSE_BOX_BUSSBAR_C
FUSE_BOX_BUSSBAR_E
B
PWR_BULK_3
15
O
40
AMPS
F15
16
P
10
AMPS
F16
17
Q
25
AMPS
F17
18
R
7.5
AMPS
F18
19
S
7.5
AMPS
F19
87
30
CPR_NO
LM
H
B
C
O
1
2
2
5
8
7
36
TOP
WIPER/WASHER
SWITCH
TOP_WIPE_WASH_SW
1
R_WIPE_SW
2
-7
5
2
+9
6
4
3
1
1
FRONT
WIPER
SWITCH
A/C
SWITCH
-7
1
+8
2
3
FRONT
WASHER
SWITCH
REAR
WIPER
MOTOR
M
C
A
GROUND
PARK
RUN
VALVE DRIVE MODULE
POWER GROUND
145
HVALVE_5F
C
HVALVE_5F
A
190
VALVE
POTENTIOMETER
POT_3F
A
POT_3F
B
12V_BUSSBAR
BC1A
LP5
BC1
BEACON/STROBE OPTION
FUSE_BOX_BUSSBAR_E
C
PWR_BULK_3
25
Y
40
AMPS
F25
87
30
LPR_NO
G
RDLIGHT_BULK_7
sht2 BU3D
GH1J
GH2J
BPB
BPC
BPD
BPM
BPS
BPD1
BPC1
BPB1
BPM1
BPS1
BAT2P
ECM CIRCUIT
DIAGONSTIC
PLUG
BPL1
BPL2
BPL2
FUEL SHUTOFF
POWER
ECM
A
B
125
AMPS
GH_FUSE_1
A
B
125
AMPS
GH_FUSE_2
sht 1 GH1P
sht1GH2P
BATT2-12V
GH1_NO
GH2_NO
P1
W
P
H
F
E
S
M
D
C
B
A
sht 1 ST4A
P5
E
P6
A
P7
G
F
E
D
C
B
A
P5
B
P6
B
P6
F
P6
E
P6
D
P6
C
7.5AMPS
P5
D
P5
F
7.5AMPS
7.5AMPS
P5
A
P5
C
10AMPS
10AMPS
sht 1 BAT2P
10AMPS
sht 4 BPL2
(TO BATT2-12V POS)
sht4BPL2
OEM 50 PIN
A CONNECTOR
ON ECM
OEM_50A
44
12
2
29
28
20
38
40
39
5
OEM_23M
A
B
C
D
M
S
E
F
H
P
W
CHASSIS CIRCUIT
ROAD LIGHT/WORK LIGHT OPTION
D1 D2
D3
D4 D4A
D13
AW1
D8
D1A
12V_BUSSBAR
AD1
BU3C
PB3B
BU3D
BA4A
FUSEBOX_BUS_BAR_B
ABPS
ABPS_LAMP
TA CH
HR
FUEL
COOLANT
FUEL_SEND
COOLANT_SEND
HHOTS
HHOTS_LAMP
HTTS
HTTS_LAMP
HOFPS
HOFPS_LAMP
AFPS
AFPS_LAMP
ELOPS
ELOPS_LAMP
ALT
ALT_LAMP
DASH_F
1
DASH_F
2
DASH_F
4
DASH_F
5
DASH_F
6
DASH_F
9
DASH_F
DASH_F
DASH_F
PARK_BR
DASH_PARK_BR
8
H
10
AMPS
F8
A
SENS_BULK
C
SENS_BULK
J
SENS_BULK
BUZZER
sht 1 AW1
sht 1 AD1
LIGHTING_CAB_4F
A
B
C
D
D
C
B
A
sht1BU3C
9
I
3
AMPS
F9
sht 1 PB3B
FUEL_F
A
sht3BU3D
sht 1 BA4A
ENGINE CIRCUIT