Corolla Sedan Blower Motor Relay Location for Heating and AC - Page 2715
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Blower Motor Relay: Testing and Inspection
Heater Main (Blower) Relay Testing
INSPECT RELAY OPERATION
With No Power Applied
Continuity should exist between terminals 1 and 3 and also 2 and 4. If not as specified, replace the relay.
With Power Applied
Apply power to terminals 1 and 3. Continuity should exist between terminals 4 and 5. If not as specified, replace the relay.