Exterior Lights Schematics. GMC Truck TopKick C-Series (Crew) C4/C5 2003

GM Service Manual Online

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2003 🢒 TopKick C-Series (Crew) C4/C5 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Exterior Lights Schematics

Figure 1:	Hazard and Turn Signal Master Electrical Component List Exterior Lighting Systems Description and Operation Park Lamps, Roof Marker Lamps Underhood Fuse Block, I/P Fuse Block, BATT/HAZ Fuse, PWR ACCY, HAZARD, TRLR TRN/HAZ, and STOP Fuses/Circuit Breakers Ignition Switch, OFF/RUN/START, RUN/START, and START Bus Bars I/P Fuse Block, TURN/BACKUP Fuse/Circuit Breaker Stoplamp Switch G101 - 1 of 2 Upfitter Connector Upfitter Connector Upfitter Connector Upfitter Connector G112, G113, G203 - 4 of 4, G204, G205 and G400 G112, G113, G203 - 4 of 4, G204, G205 and G400 G112, G113, G203 - 4 of 4, G204, G205 and G400 G112, G113, G203 - 4 of 4, G204, G205 and G400
Figure 2:	Park Lamps Master Electrical Component List Exterior Lighting Systems Description and Operation Stoplamp Switch Hazard and Turn Signal Underhood Fuse Block, LIGHTING and HVAC Fuses, I/P Fuse Block, and COURTESY, PARK, ILLUM, RH PARK LP, and LH PARK LP Fuses/Circuit Breakers IGN 4 and HDLP Fuses, ELECTRIC BRAKE (C4/C5), BRAKE LAMP (C6/C7/C8), AND PWR WINDOW Circuit Breakers, RADIO, DRL, and MARKER Fuses/Circuit Breakers Underhood Fuse Block, LIGHTING and HVAC Fuses, I/P Fuse Block, and COURTESY, PARK, ILLUM, RH PARK LP, and LH PARK LP Fuses/Circuit Breakers Headlights, Daytime Running Lamps (DRL) Trailer Tow Connector (C4/C5) Trailer Tow Connector (C6/C7/C8) Upfitter Connector Upfitter Connector Upfitter Connector Trailer Tow Connector (C4/C5) Hazard and Turn Signal Hazard and Turn Signal Hazard and Turn Signal Hazard and Turn Signal Stoplamp Switch Stoplamp Switch G101 - 2 of 2 G101 - 1 of 2 G102 - 1 of 2 G102 - 1 of 2 G200, G202, and G203 - 1 of 4 G200, G202, and G203 - 1 of 4 G200, G202, and G203 - 1 of 4 G200, G202, and G203 - 1 of 4
Figure 3:	Brake Switch Master Electrical Component List Exterior Lighting Systems Description and Operation Backup Lamps Park Lamps, Roof Marker Lamps RADIO/CHIME, CHMSL, and PWR POST Fuses/Circuit Breakers Upfitter Connector I/P Fuse Block, BRAKE ISO Fuse/Circuit Breaker IGN 4 and HDLP Fuses, ELECTRIC BRAKE (C4/C5), BRAKE LAMP (C6/C7/C8), AND PWR WINDOW Circuit Breakers, RADIO, DRL, and MARKER Fuses/Circuit Breakers Hazard and Turn Signal G103 - 1 of 2, G105, and G106 G103 - 1 of 2, G105, and G106 Trailer Tow Connector (C4/C5)
Figure 4:	Backup Lamps Master Electrical Component List Exterior Lighting Systems Description and Operation Trailer Tow Connector (C6/C7/C8) Stoplamp Switch Underhood Fuse Block, ENG 3, O2A, and ENG 2 Fuses (LG4) Ignition Switch, OFF/RUN/START, RUN/START, and START Bus Bars I/P Fuse Block, TURN/BACKUP Fuse/Circuit Breaker Upfitter Connector Trailer Tow Connector (C6/C7/C8) Park Lamps, Roof Marker Lamps Park Lamps, Roof Marker Lamps G200, G202, and G203 - 1 of 4
Figure 5:	Trailer Connector - C6/C7/C8 Master Electrical Component List Exterior Lighting Systems Description and Operation Trailer Tow Connector (C4/C5) Backup Lamps B+ Bus Bar Park Lamps, Roof Marker Lamps Upfitter Connector Backup Lamps Upfitter Connector G112, G113, G203 - 4 of 4, G204, G205 and G400
Figure 6:	Trailer Connector -- C4/C5 Master Electrical Component List Exterior Lighting Systems Description and Operation Upfitter Connector Trailer Tow Connector (C6/C7/C8) B+ Bus Bar ABS 2, ABS 3, ABS 1, and E/A Pump Fuses and HORN Fuse/Circuit Breaker Park Lamps, Roof Marker Lamps Upfitter Connector Stoplamp Switch Upfitter Connector Park Lamps, Roof Marker Lamps G112, G113, G203 - 4 of 4, G204, G205 and G400
Figure 7:	Trailer Connector-C4/C5 Master Electrical Component List Exterior Lighting Systems Description and Operation Trailer Tow Connector (C4/C5) Hazard and Turn Signal Hazard and Turn Signal Underhood Fuse Block, I/P Fuse Block, BATT/HAZ Fuse, PWR ACCY, HAZARD, TRLR TRN/HAZ, and STOP Fuses/Circuit Breakers Hazard and Turn Signal Hazard and Turn Signal Park Lamps, Roof Marker Lamps Stoplamp Switch Park Lamps, Roof Marker Lamps Park Lamps, Roof Marker Lamps Backup Lamps I/P Fuse Block, IGN 4, and AUX RLY Fuses/Circuit Breakers Trailer Tow Connector (C4/C5) Trailer Tow Connector (C4/C5) Trailer Tow Connector (C6/C7/C8) Trailer Tow Connector (C6/C7/C8) G103 - 1 of 2, G105, and G106 G103 - 1 of 2, G105, and G106 G112, G113, G203 - 4 of 4, G204, G205 and G400