Hummer H1 (2006+). Manual - part 159
OBD-480
On-Board Diagnostics
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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