Blower Motor Resistor: Testing and Inspection

For circuit descriptions and diagrams, refer to the appropriate wiring
information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, further details on wire harness routing and retention, as well as pin-out and location views for the various wire harness connectors, splices and grounds.

1. Disconnect and isolate the battery negative cable.
2. Disconnect the rear HVAC wire harness connector from the rear blower motor resistor.
3. Check for continuity between each of the blower motor switch input terminals of the blower motor resistor and the resistor output terminal. In each case there should be continuity. If OK, repair the wire harness circuits between the blower motor switch and the blower motor resistor, blower motor or blower motor relay as required. If not OK, replace the faulty blower motor resistor block.