COOLING FAN – GMC C3500 HD 1998 – SYSTEM WIRING DIAGRAMS

COOLING FAN

5.7L

5.7L (VIN R), Cooling Fan Wiring Diagram for GMC C3500 HD 1998

List of elements for 5.7L (VIN R), Cooling Fan Wiring Diagram for GMC C3500 HD 1998:

• (fwd lamps harn, 5 cm from right headlamp breakout)
• (in underhood fuse/relay center)
• (right front of engine compartment)
• A/c comp fuse 10a
• Aux fan ctrl
• Aux fan fuse 30a
• Auxiliary cooling fan motor
• Auxiliary cooling fan relay
• Fan req
• G101
• Heater and a/c control module
• Hot at all times
• Hot in run or start
• Recirculation door motor (on a/c- heater housing)
• Red
• Relay ctrl
• S128
• S212 (i/p harn, 8 cm from radio breakout)
• Underhood fuse-relay center
• Vehicle control module (left rear of engine compt)

7.4L

7.4L (VIN J), Cooling Fan Wiring Diagram for GMC C3500 HD 1998

List of elements for 7.4L (VIN J), Cooling Fan Wiring Diagram for GMC C3500 HD 1998:

• (fwd lamps harn, 5 cm from right headlamp breakout)
• (in underhood fuse/relay center)
• (right front of engine compartment)
• A/c comp fuse 10a
• Aux fan ctrl
• Aux fan fuse 30a
• Auxiliary cooling fan motor
• Auxiliary cooling fan relay
• Fan req
• G101
• Heater and a/c control module
• Hot at all times
• Hot in run or start
• Recirculation door motor (on a/c- heater housing)
• Red
• Relay ctrl
• S128
• S212 (i/p harn, 8 cm from radio breakout)
• Underhood fuse-relay center
• Vehicle control module (left rear of engine compt)