Blower Motor Relay: Testing and Inspection

INSPECTION




1. DISCONNECT RIB NO.3
Remove the bolt and nut holding to the RIB No.3.

2. REMOVE HEATER MAIN RELAY FROM INSTRUMENT PANEL RELAY BLOCK

3. INSPECT HEATER MAIN RELAY




a. Inspect the 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 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.




b. Inspect relay operation.
1. Apply battery positive voltage across terminals 1 and 2.
2. Using an ohmmeter, check that there is continuity between terminals 3 and 5.
If there is no continuity, replace the relay.
3. Check that there is no continuity between terminals 3 and 4.
If there is no continuity, replace the relay.

4. REINSTALL HEATER MAIN RELAY
5. RECONNECT INSTRUMENT PANEL RELAY BLOCK