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

Headlamp Switch, Ambient Light Sensor (C67)


Object Number: 424536  Size: FS
Lighting Systems Components
Headlights Circuit Description
Headlamp Switch, Ambient Light Sensor (CJ2)
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Low Beam Headlamps
DRL, High Beam Headlamps, Dimmer Switch
Dimming Control
Serial Data Class 2
Temperature Sensors W/CJ2
G200 (1 of 2)
Figure 2:

Headlamp Switch, Ambient Light Sensor (CJ2)


Object Number: 397812  Size: FS
Lighting Systems Components
Headlights Circuit Description
DRL, High Beam Headlamps, Dimmer Switch
Headlamp Switch, Ambient Light Sensor (C67)
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Low Beam Headlamps
DRL, High Beam Headlamps, Dimmer Switch
Serial Data Class 2
Serial Data Class 2
Temperature Sensors W/CJ2
Dimming Control
G200 (1 of 2)
Figure 3:

DRL, High Beam Headlamps, Dimmer Switch


Object Number: 397806  Size: FS
Lighting Systems Components
Headlights Circuit Description
Low Beam Headlamps
Headlamp Switch, Ambient Light Sensor (CJ2)
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Battery Positive Voltage Circuits from the Battery
Battery Positive Voltage Circuits from the Battery
Battery Positive Voltage Circuits from the Battery
Battery Positive Voltage Circuits from the Battery
Low Beam Headlamps
Low Beam Headlamps
G103
G200 (1 of 2)
G401 (2 of 2)
G401 (2 of 2)
Figure 4:

Low Beam Headlamps


Object Number: 397801  Size: FS
Lighting Systems Components
Headlights Circuit Description
DRL, High Beam Headlamps, Dimmer Switch
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
DRL, High Beam Headlamps, Dimmer Switch
DRL, High Beam Headlamps, Dimmer Switch
FOG/DRL Fuse, Headlamp, Fog Lamp and DRL Relays (Underhood Fuse Block)
License Plate Lamps, Park Lamp Relay
Serial Data Class 2
Wiper/Washer Switch and Fuse
G103
G401 (2 of 2)
G401 (2 of 2)