GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
Chevrolet
🢒
2003
🢒
Express
🢒
Body and Accessories
🢒
Lighting Systems
🢒 Exterior Lights Schematics
Figure
1:
FLASHER, IGN E and STOP LP Fuses
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Headlamp and Panel Dimmer Switch, Park Lamp Relay, and FR PRK, LR PRK, RR PRK, TRLR PRK, UPFTR PRK Fuses
B+ Bus - Underhood Fuse Block
B+ Bus - Underhood Fuse Block
IGN B Fuse
SPARE, IGN E, SIR, TBC IGN 1, and ISRV Fuses
Backup (Cutaway) and Trailer Wiring
SPARE, IGN E, SIR, TBC IGN 1, and ISRV Fuses
Windshield Washer Switch
Headlights
G302
Cruise Control
Cruise Control
G302
G400
G401 (Passenger/Cargo)
Figure
2:
Headlamp and Panel Dimmer Switch, Park Lamp Relay, and FR PRK, LR PRK, RR PRK, TRLR PRK, UPFTR PRK Fuses
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Turn Signal/Hazard FLasher Module, and DR TRN MIR, PASS TRN MIR Fuses
FLASHER, IGN E, and STOP LP Fuses
Controls and Backlighting - 1 of 3
Driver, Passenger, and Cargo Mini Wedges
Headlights
B+ Bus - Body Fuse Block
Backup Lamps (w/o Cutaway) and Front Park/Turn/Marker Lamps
LR STOP/TRN, RR STOP/TRN, LR TURN, RR TURN, and TRLR STOP/TURN Fuses
LR STOP/TRN, RR STOP/TRN, LR TURN, RR TURN, and TRLR STOP/TURN Fuses
FRLR PRK, RR PRK, TRLR PRK, and UPFTR PRK Fuses
Backup (Cutaway) and Trailer Wiring
G302
Figure
3:
Turn Signal/Hazard Flasher Module and DR TRN MIR, PASS TRN MIR Fuses
Master Electrical Component List
Exterior Lighting Systems Description and Operation
LR STOP/TRN, RR STOP/TRN, LR TURN, RR TURN, and TRLR STOP/TURN Fuses
Headlamp and Panel Dimmer Switch, Park Lamp Relay, and FR PRK, LR PRK, RR PRK, TRLR PRK, UPFTR PRK Fuses
LR STOP/TRN, RR STOP/TRN, LR TURN, RR TURN, and TRLR STOP/TURN Fuses
LR STOP/TRN, RR STOP/TRN, LR TURN, RR TURN, and TRLR STOP/TURN Fuses
Splice Pack SP347, and G347 - 1 of 3
Splice Pack SP347, and G347 - 2 of 3
Splice Pack SP347, and G347 - 1 of 3
Figure
4:
LR STOP/TRN, RR STOP/TRN, LR TURN, RR TURN and TRLR STOP/TRN Fuses
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Backup Lamps (w/o Cutaway) and Front Park/Turn/Marker Lamps
Turn Signal/Hazard FLasher Module, and DR TRN MIR, PASS TRN MIR Fuses
Turn Signal/Hazard FLasher Module, and DR TRN MIR, PASS TRN MIR Fuses
Turn Signal/Hazard FLasher Module, and DR TRN MIR, PASS TRN MIR Fuses
Headlamp and Panel Dimmer Switch, Park Lamp Relay, and FR PRK, LR PRK, RR PRK, TRLR PRK, UPFTR PRK Fuses
B+ Bus - Underhood Fuse Block
Headlamp and Panel Dimmer Switch, Park Lamp Relay, and FR PRK, LR PRK, RR PRK, TRLR PRK, UPFTR PRK Fuses
Backup Lamps (w/o Cutaway) and Front Park/Turn/Marker Lamps
Backup Lamps (w/o Cutaway) and Front Park/Turn/Marker Lamps
Backup (Cutaway) and Trailer Wiring
Backup (Cutaway) and Trailer Wiring
G402 (Passenger/Cargo) and G403 (PRP)
G401 (Passenger/Cargo)
G400
G402 (Passenger/Cargo) and G403 (PRP)
Figure
5:
Backup Lamps - w/o Cutaway and Front Park/Turn/Marker Lamps
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Backup (Cutaway) and Trailer Wiring
LR STOP/TRN, RR STOP/TRN, LR TURN, RR TURN, and TRLR STOP/TURN Fuses
Headlamp and Panel Dimmer Switch, Park Lamp Relay, and FR PRK, LR PRK, RR PRK, TRLR PRK, UPFTR PRK Fuses
Inside Rearview Mirror
LR STOP/TRN, RR STOP/TRN, LR TURN, RR TURN, and TRLR STOP/TURN Fuses
LR STOP/TRN, RR STOP/TRN, LR TURN, RR TURN, and TRLR STOP/TURN Fuses
G100, and G101
G100, and G101
G401 (Passenger/Cargo)
G402 (Passenger/Cargo) and G403 (PRP)
Figure
6:
Backup (Cutaway) and Trailer Wiring
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Backup Lamps (w/o Cutaway) and Front Park/Turn/Marker Lamps
IGN B Fuse
B+ Bus - Underhood Fuse Block
O2A, O2B, SPARE, BTSI BU, PCM IGN 1, BTSI, and TRLR BU Fuses
FLASHER, IGN E, and STOP LP Fuses
Headlamp and Panel Dimmer Switch, Park Lamp Relay, and FR PRK, LR PRK, RR PRK, TRLR PRK, UPFTR PRK Fuses
LR STOP/TRN, RR STOP/TRN, LR TURN, RR TURN, and TRLR STOP/TURN Fuses
LR STOP/TRN, RR STOP/TRN, LR TURN, RR TURN, and TRLR STOP/TURN Fuses
G400
G302