Hummer H1 (2006+). Manual — part 393
12-248
Electrical System
______________________________________________________
C72/16 WAY LOCKING DIFFERENTIAL CONTROL MODULE CONNECTOR LOCATION BEHIND
CENTER CONSOLE.
pin
ckt
color
description
A1
--
--
--
A2
--
--
--
A3
--
--
--
A4
--
--
--
A5
784
DB
Low range switch signal (-)
A6
136
BK
Vehicle speed input (+)
A7
879
WH/BK
Warning light activation signal
A8
878
LG/BK
Warning light activation signal
B1
352
BK
Vehicle speed input (-)
B2
--
--
--
B3
--
--
--
B4
866
OR
Rear locker switch input signal
B5
868
GY
Axle “ON” indicator signal (-)
B6
875
PK
Front locker switch input signal
B7
877
GY/BK
Axle “ON” indicator signal (-)
B8
860
RD
+12v fused ignition input
_____________________________________________________
Electrical System 12-249
C73/ 6 WAY LOCKING DIFFERENTIAL CONTROL MODULE CONNECTOR LOCATION: BEHIND
CENTER CONSOLE.
C74/ 6 WAY REAR A/C REFRIGERANT SOLENOID MODULE LOCATION: BEHIND CENTER
CONSOLE
pin
ckt
color
description
C
59
BK
Ground G4
D
870
BR/WH
Front axle solenoid (-)
E
871
YL/WH
Front axle solenoid (+)
F
859
RD/YL
+12v fused battery voltage
G
861
BR
Rear axle solenoid (-)
H
862
YL
Rear axle solenoid (+)
Pin
ckt
color
description
A
408
WH
Solenoid ground signal
B
58
BK
Ground G4
C
399
DG
+12v ignition input
D
402
LB
Input from control head
E
399
DG
Solenoid power signal
--
--
--
12-250
Electrical System
______________________________________________________
C75/56 WAY ECM J1 (BLUE) LOCATION: DRIVERSIDE COWL TOP UNDER ECM
PIN
CKT
COLOR
DESCRIPTION
1
211
YL
SAE J1939 CAN HI
2
212
DG
SAE J1939 CAN LO
3
620
TN
Oil pressure reference signal
4
270
GN
Transmission temperature signal
5
1037
RD
+12 Battery voltage
6
625
BR
Coolant temperature signal
7
255
OR/BK
Baro sensor ground
8
156
PK/BK
Cam sensor ground
9
244
BK
Ground
10
242
PK
Ignition 1 Voltage
11
--
--
--
12
--
--
--
13
654
DB
MAF sensor signal
14
105
BR/WH
EGR valve position signal
15
914
PP
Class II (J1850 data link)
16
--
--
--
17
720
TN
5 volt reference
18
243
PK
+12v Ignition feed ECM
19
242
PK
Ignition 1 voltage
20
1037
RD
Battery positive voltage
21
--
--
--
22
--
--
--
23
367
GY
5 volt reference turbo vein position sensor
24
--
--
--
_____________________________________________________
Electrical System 12-251
25
--
--
--
26
338
DB
Wait to start indicator control
27
28
721
LB
APP sensor 2 (5 volt signal)
29
--
--
--
30
--
--
--
31
612
WH/BK
Baro pressure (5 volt signal)
32
717
TN
APP sensor 1 (5 volt signal)
33
508
TN
Fuel rail pressure sensor (5 volt signal)
34
617
GY
Engine oil pressure (5 volt signal)
35
--
--
--
36
723
YL
APP sensor 3 (5 volt signal)
37
513
YL
Fuel pressure regulator solenoid control
38
--
--
--
39
614
GY
MAP sensor (5 volt signal)
40
510
PP/WH
Fuel pressure regulator solenoid control
41
--
--
--
42
514
PK
Generator field duty cycle signal
43
--
--
--
44
--
--
--
45
--
--
--
46
353
YL
Speed Signal
47
106
GY
EGR valve (5 volt signal)
48
--
--
--
49
--
--
--
50
254
RD
CAM sensor (5 volt signal)
51
511
YL
Fuel pressure regulator solenoid control
52
516
GY/BK
FICM relay control
53
136
BK
54
512
PP/WH
Fuel pressure regulator solenoid supply voltage
55
--
--
--
56
514
PK
Ignition voltage +12v
PIN
CKT
COLOR
DESCRIPTION
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