Component Testing
WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Heated Seat Switch
- Ignition OFF, disconnect the X4 harness connector at the appropriate door lock/window switch.
- Test for infinite resistance between the signal circuits listed below and the low reference circuit terminal 4 with the switch in the open position.
- Seat back and cushion heat mode terminal 6
- Seat back only mode terminal 7
- If not the specified value, replace the heated seat switch.
- Test for less than 2 Ω between the signal circuits listed below and the low reference circuit terminal 4 with the switch in the closed position.
- Seat back and cushion heat mode terminal 6
- Seat back only mode terminal 7
- If greater than the specified range for any of the tests, replace the heated seat switch.
Heated Seat Switch Indicators
- Ignition OFF, disconnect the X4 harness connector at the appropriate door lock/window switch.
- Connect a 3 A fused jumper wire between the low reference circuit terminal 4 and ground.
- Connect a test lamp between B+ and each control circuit listed below. The appropriate indicator should illuminate.
- Seat back and cushion mode indicator terminal 10
- Seat back only mode indicator terminal 11
- Low heat indicator terminal 9
- Medium heat indicator terminal 1
- High heat indicator terminal 2
- If any indicator does not illuminate, replace the heated seat switch.
- If all indicators illuminate, replace the door lock/window switch.