Hummer H1 (2006+). Manual — part 159
OBD-480
On-Board Diagnostics
_____________________________________________
4
20
RD
Left rear turn signal
5
12
OR
Head lamp high beam feed
6
13
TN
Head lamp low beam feed
7
33
WH
neutral safety switch feed
8
962
BR
Trailer lights
9
603
RD
ABS lamp activation
10
961
PP
TT4 lamp activation
11
606
OR
ABS diagnostic line
12
1
DB
Horn relay activation
13
42
BR
Low brake fluid lamp activation
14
640
OR
IGN+ CTIS warning circuits
15
327
YL
Water-in-fuel lamp activation
16
428
PK
CTIS buzzer activation
17
41
TN
Brake fluid level sensor feed
18
17
PP
Illumination circuit (+)
19
92
GY
CTIS rear inflate solenoid activation
20
607
TN
ABS module diagnostic line
21
47
LG
Deflate solenoid activation
22
767
BR
Compass mirror temperature signal
23
91
TN
CTIS front inflate solenoid activation
24
2
LG
Right front turn signal
25
140
OR
Reverse signal
26
3
LB
Left front turn signal
27
21
GY
Rear tail lamp feed
28
298
BR
Backup light switch feed
29
5
DG
Right rear turn signal
30
9
YL
Backup light activation
31
400
LG
Ignition +12v
32
151
GY
Cruise control ON/OFF signal
33
784
DB
T-case range switch input to the ECM (-)
34
809
TN
Brake light input for the ECM
35
242
PK
Ignition 1 Voltage
36
714
DB
Check throttle lamp activation
37
724
DG
APP sensor 3 signal
38
723
YL
APP sensor 3 (5 volt signal)
39
270
DG
Transmission temperature signal
40
520
WH
Brake lamp switch
41
644
YL
Tachometer signal
42
232
BARE
Shield
43
44
861
BR
Rear Elocker activation signal (-)
PIN
CKT
COLOR
CIRCUIT DESCRIPTION
_____________________________________________
On-Board Diagnostics OBD-481
5745804
45
862
YL
Rear Elocker activation signal (+)
46
212
DG
SAE J1939 CAN LO
47
211
YL
SAE J1939 CAN HI
48
37
YL
Batt feed to interior fuse box
49
50
1072
BK
Shift interlock cable
51
52
870
BR/WH
Front Elocker activation signal (-)
53
871
YL/BK
Front Elocker activation signal (+)
54
37
YL
Ignition relay feed
55
37
YL
Battery feed to interior accessories
56
667
PP
Over drive disable switch light activation (ground)
57
666
YL
Over drive disable request
58
665
DG
Tow haul switch light activation (ground)
59
664
LG
Tow Haul switch request
60
61
62
722
PP
Accelerator pedal position sensor 2 (+)
63
80
WH
Underhood lamp power
64
904
OR/BK
Alternator signal to instrument panel
65
941
TN
Lower windshield washer pump activation
66
580
BR
Fused battery input to the heated mirror.
67
136
BK
Vehicle speed sensor
68
353
YL
Speedometer signal (+)
69
46
WH
CTIS compressor relay activation
70
71
718
DB
Accelerator pedal position sensor 1 signal (PWM)
72
520
WH
Brake lamp switch
73
717
TN
APP sensor 1 (5 volt signal)
74
338
DB
Wait lamp activation
75
720
TN
Accelerator pedal position sensor 1 (+)
76
198
TN
A/C request
77
663
PK
Range limited circuit
78
662
WH
High trans temp signal
79
38
RD
Head lamp switch feed
80
914
PP
Class II (J1850 data link)
81
658
BR
Check engine lamp activation
82
721
LB
Accelerator pedal position sensor 2 signal (PWM)
83
29
PK
Fuel gauge signal
84
786
RD
Fuel selector valve control
85
625
BR
Coolant temperature signal
PIN
CKT
COLOR
CIRCUIT DESCRIPTION
OBD-482
On-Board Diagnostics
_____________________________________________
86
620
TN
Oil pressure reference signal
87
793
YL
Low coolant lamp activation
88
794
RD
Low air warning lamp activation
89
789
BR
Fuel selector valve control
90
210
DG
Transfer case lock lamp activation
91
725
GY
APP 3
92
719
BR
Accelerator pedal position sensor 1 (-)
93
152
DB
Cruise set/coast signal
94
153
LG
Cruise resume/accelerate signal
95
43
DB
Trailer Brake activation
96
195
YL
Headlight switch feed
97
98
575
OR
ABS valve relay (+)
99
37
YL
start relay feed
100
37
YL
Ignition switch feed
101
688
RD
Rear window defrost feed
102
175
LB
Power window relay feed
PIN
CKT
COLOR
CIRCUIT DESCRIPTION
_____________________________________________
On-Board Diagnostics OBD-483
5745804
56 WAY INSTRUMENT PANEL Location: Behind Instrument Panel C3 Male C3 Female
PIN
CKT
COLOR
DESCRIPTION
A1
195
YL
Headlight switch feed
A2
54
DG
Dome lamp switch feed
A3
53
DB
Dome lamps feed
A4
270
DG
Transmission temperature signal
B1
38
RD
Head lamp switch feed
B2
15
WH
Head lamp feed to dimmer module
B3
253
PP
Output +12v to switch
B4
254
WH
Low temp request to module
C1
450
PK
Seat belt lamp activation
C2
912
DB
“Bulb Check” input from the coolant/fuel module
C3
915
LB
+10 volt supply to the CTIS module
C4
D1
338
DB
Glow plug wait lamp activation
C3 MALE
E
G
F
D
C
B
A
M
P
N
L
K
J
H
1
2
3
4
5
10
9
8
7
6
PIN A1
PIN H6
C3 FEMALE
E
G
F
D
C
B
A
M
P
N
L
K
J
H
6
7
8
9
10
5
4
3
2
1
CAV H6
CAV A1
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