Nippondenso Relay

1. Remove No. 1 cooling fan relay.





2. Inspect relay continuity.
(a) Using an ohmmeter, check that there is continuity between terminals 1 and 2.
If there is no continuity, replace the relay.
(b) Check that there is continuity between terminals 3 and 4.
If there is no continuity, replace the relay.





3. Inspect relay operation.
(a) Apply battery voltage across terminals 1 and 2.
(b) Using an ohmmeter, check that there is no continuity between terminals 3 and 4.
If there is continuity, replace the relay.
4. Reinstall No. 1 cooling fan relay.