Radiator Cooling Fan Motor Relay: Testing and Inspection

INSPECTION





1. COOLING FAN RELAY
COOLING FAN RELAY NO. 3
a. Inspect the cooling fan relay continuity.
1) Using an ohmmeter, check that there is continuity between terminals 1 and 2.
If there is no continuity, replace the relay.
2) Check that there is no continuity between terminals 3 and 5.
If there is continuity, replace the relay.
3) Apply battery voltage across terminals 1 and 2.
4) Using an ohmmeter, check that there is continuity between terminals 3 and 5.
If there is no continuity, replace the relay.





2. COOLING FAN RELAY NO. 2
a. Inspect the cooling fan relay continuity.
1) Using an ohmmeter, check that there is continuity between terminals 1 and 2.
If there is no continuity, replace the relay.
2) Using an ohmmeter, check that there is continuity between terminals 3 and 4.
If there is no continuity, replace the relay.
3) Check that there is no continuity between terminals 3 and 5.
If there is continuity, replace the relay.
4) Apply battery voltage across terminals 1 and 2.
5) Using an ohmmeter, check that there is continuity between terminals 3 and 5.
If there is no continuity, replace the relay.