Equipment Required:
Fig. 19 Electrical Cooling Fan
1 - RADIATOR
2 - ELECTRIC FAN ASSEMBLY
3 - FAN SHROUD (LOWER)
4 - SCREW
Test Procedure:
1) Inspect 10A fuse in junction block and 40A maxi fuse in PDC (Fig. 20).
(2) Remove Cooling Fan Relay from the PDC and make the following checks at the relay connector:
If no battery voltage present, check for open/short in circuit F18 between the junction block and the relay.
Fig. 20 Power Distribution Center (PDC)
1 - POWER DISTRIBUTION CENTER (PDC)
RADIATOR COOLANT FLOW CHECK
Use the following procedure to determine if coolant is flowing through cooling system.
(1) Idle engine until operating temperature is reached. If upper radiator hose is warm to the touch, thermostat is opening and coolant is flowing to radiator.
WARNING: HOT, PRESSURIZED COOLANT CAN CAUSE INJURY BY SCALDING. USING A RAG TO COVER RADIATOR PRESSURE CAP, OPEN RADIATOR CAP SLOWLY TO FIRST STOP. ALLOW ANY BUILT-UP PRESSURE TO VENT TO THE RESERVE/ OVERFLOW TANK. AFTER PRESSURE BUILD-UP HAS BEEN RELEASED, REMOVE CAP FROM FILLER NECK.
(2) Drain a small amount of coolant from radiator until ends of radiator tubes are visible through filler neck. Idle engine at normal operating temperature. If coolant is flowing past exposed tubes, coolant is circulating.