B2345 00
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the X1 harness connector at the RHSM.
- Test for infinite resistance between the control circuit terminal 3 and ground.
- If not the specified value, test the control circuits listed below for a short to ground:
- Left rear seat heater element terminal 3
- Left rear seat heater element terminal 5
- If not the specified value, test the control circuits listed below for a short to ground:
- Test for infinite resistance between the control circuit terminal 6 and ground.
- If not the specified value, test the control circuits listed below for a short to ground:
- Right rear seat heater element terminal 6
- Right rear seat heater element terminal 2
- If not the specified value, test the control circuits listed below for a short to ground:
- Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal 3 and ground.
- If the test lamp illuminates, test the control circuits listed below for a short to voltage:
- Left rear seat heater element terminal 3
- Left rear seat heater element terminal 5
- If the test lamp illuminates, test the control circuits listed below for a short to voltage:
- Verify that a test lamp does not illuminate between the supply voltage circuit terminal 6 and ground.
- If the test lamp illuminates, test the control circuits listed below for a short to voltage:
- Right rear seat heater element terminal 6
- Right rear seat heater element terminal 2
- If the test lamp illuminates, test the control circuits listed below for a short to voltage:
- If all circuits test normal, replace the RHSM.