Spectrum L4-91.5 1.5L (1985)
Radiator Cooling Fan Motor: Testing and Inspection
SYSTEM TEST
1.
Start engine and run until it reaches normal operating temperature.
2.
Monitor coolant temperature using suitable thermometer and observe cooling fan operation.
3.
Cooling fan should begin to operate when coolant temperature reaches 186-192°F., and fan should stop running when coolant temperature drops to
178-183°F.
4.
If fan fails to operate, proceed as follows:
a. Ground white/blue fan test lead located in harness at left rear of engine compartment.
b. If fan operates, replace thermosensor and recheck system operation.
c. If fan fails to operate, check for blown fuse, defective relay, damaged or disconnected wiring, disconnected fan ground lead or defective fan
motor.
5.
On models with A/C, place control in maximum cooling position.
6.
If cooling fan does not operate when compressor clutch is engaged, check for open circuit between fan relay and A/C switch, defective switch or
defective compressor clutch diode.
COMPONENT TESTING
Fan Motor
1.
Disconnect electrical connector to fan motor.
2.
Connect battery voltage to terminal using suitable jumper wire.
3.
If fan fails to operate, check ground strap connection, Fig. 1, and repair as needed.
4.
If ground is satisfactory, motor is defective.
Fan Relay
1.
Disconnect electrical connector and remove relay. Fan relay is located in left front of engine compartment above battery.
2.
Connect ohmmeter between white/black and white/green wire terminals on relay.
3.
Meter should indicate no continuity.
4.
Connect battery voltage across white and white/blue wire terminals on relay.
5.
With relay energized, ohmmeter should indicate continuity between white/black and white/green wire terminals.
Fig. 1 Cooling fan & thermosensor installation
Thermosensor
