Diagnosis And Testing - Heated Seat Elements

HEATED SEAT ELEMENTS

The wire harness connectors for the seat cushion and seat back heating elements are located under the seat, at the main seat harness. In order to access and test the heated seat elements it will be necessary to remove the appropriate front seat retaining bolts and lay the seat rearward, up against one of the rear seats. It is not necessary to disconnect the seat electrical connectors, just use care not to damage the attached wire harnesses while testing.

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


NOTE: When checking heated seat elements for continuity, be certain to move the heating element being checked. Moving the element, such as sitting in the seat will eliminate the possibility of an intermittent open in the element which would only be evident if the element was in a certain position. Failure to check the element in various positions could result in an incomplete test.

SEAT CUSHION ELEMENT

1. From under the vehicle, remove the appropriate seats four retaining nuts.

2. From inside the vehicle, pull the seat up, off the mounting studs and lay it back, up against one of the rear seats.

3. Locate and disconnect the black 4-way electrical connector, connected to the main seat harness.

4. Check for continuity between the two circuit cavities labeled "A" and "D" of the wire harness connector (Red & Black wires). There should be continuity. If OK, refer to the Seat Heater Control Module for complete system testing procedures. If not OK, install a replacement heated seat cushion element.


SEAT BACK ELEMENT

1. From under the vehicle, remove the appropriate seats four retaining nuts.

2. From inside the vehicle, pull the seat up and off the mounting studs and lay it back, up against one of the rear seats.

3. Locate and disconnect the green 2-way electrical connector, connected to the main seat harness.

4. Check for continuity between the two circuit cavities of the 2-way wire harness connector. There should be continuity. If OK, refer to the Seat Heater Control Module for complete system testing procedures. If not OK, install a replacement heated seat back element.