GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Headlamp, Fog Lamp, and Ambient Light Sensor Inputs (w/C67)


Object Number: 765764  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
G200
Serial Data Class 2
Dimming Control
Temp Sensors w/CJ2
Headlamp, Foglamp, and Ambient Light Sensor Inputs (w/CJ2)
Figure 2:

Headlamp, Fog Lamp, and Ambient Light Sensor Inputs (w/CJ2)


Object Number: 765768  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
G200
Serial Data Class 2
Dimming Control
Serial Data Class 2
Temp Sensors w/CJ2
DRL Controls and High Beam Headlamps
Headlamp, Foglamp, and Ambient Light Sensor Inputs (w/C67)
Figure 3:

DRL Controls and High Beam Headlamps


Object Number: 885697  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Battery Feed to the Fuse Block Underhood
Serial Data Class 2
Battery Feed to the Fuse Block Underhood
G103
G103
G401 (2 of 2)
G401 (2 of 2)
Fog Lamp and Headlamp Fuses and Relays (Fuse Block Underhood)
Low Beam Headlamps
Low Beam Headlamps
G200
Low Beam Headlamps
Headlamp, Foglamp, and Ambient Light Sensor Inputs (w/CJ2)
Figure 4:

Low Beam Headlamps


Object Number: 885698  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
DRL Controls and High Beam Headlamps
DRL Controls and High Beam Headlamps
G103
Fog Lamp and Headlamp Fuses and Relays (Fuse Block Underhood)
G401 (2 of 2)
G401 (2 of 2)
Power and Ground
DRL Controls and High Beam Headlamps