Seat Back Test

1. Disconnect and isolate the battery negative cable. Unplug the 2-way heated seat back wire harness connector.
2. Check for continuity between the heated seat driver circuit cavity and the ground circuit cavity of the seat back cover half of the heated seat back wire harness connector. There should be continuity. If OK, go to Step 3. If not OK, replace the faulty seat back cover.
3. Check for continuity between the heated seat driver circuit cavity of the seat back cover half of the heated seat back wire harness connector and the seat back frame. There should be no continuity. If OK, test the heated seat sensor as described. If not OK, replace the faulty seat back cover.