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DIAGNOSIS AND TESTING HEATED SEAT SWITCH For complete circuit diagrams, refer to the appropriate wiring information. The wiring information includes wiring dia- WARNING: DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING 1. If the problem being diagnosed involves inoperative heated seat switch back lighting and the cluster illumination lamps operate, go to Step 2. If the problem being diagnosed involves inoperative heated seat switch back light- 2. Disconnect and isolate the battery negative cable. Remove the heated seat switch and bezel unit from the instru- ment panel. Disconnect the heated seat switch to be tested. Check for continuity between the ground circuit 3. Reconnect the battery negative cable. Turn the park lamps on with the headlamp switch. Rotate the panel lamps dimmer thumb wheel on the headlamp switch upward to just before the interior lamps detent. Check for battery 4. Turn the ignition switch to the On position. Check for battery voltage at the fused ignition switch output (run) circuit cavity of the heated seat switch. If OK, go to Step 5. If not OK, repair the open fused ignition switch output 5. Check the continuity and resistance values of the heated seat switch in the Neutral, Low and High positions as shown in the Heated Seat Switch Continuity chart. If OK, refer to Step 6. If not OK, replace the faulty heated HEATED SEAT SWITCH CONTINUITY Switch Position Continuity Between Resistance Neutral 4 & 6 2.2 Kilohms Low 4 & 6 .415 Kilohms High 4 & 6 33 Ohms 6. Replace the inoperative heated seat switch with a known good unit and test the operation of the switch indicator lamps. If OK, discard the faulty heated seat switch. If not OK, (Refer to 8 - ELECTRICAL/ELECTRONIC CON- REMOVAL 1. Disconnect and isolate the negative battery cable. 2. Wait two minutes for the system reserve capacitor to discharge before beginning any airbag or instrument panel service. 8G - 24 HEATED SEATS - SERVICE INFORMATION DR/DH |