Circuit/System Testing
WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect the harness connector at the lumbar adjuster switch.
- Test for less than 1 ohm of resistance between the ground circuit terminal C and ground.
- If greater than 1 ohm, test the ground circuit for an open/high resistance.
- Verify that a test lamp illuminates between the B+ circuit terminal D and ground.
- If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
- Connect the harness connector at the lumbar adjuster switch.
- Disconnect the harness connector at the lumbar motor assembly.
- Connect a test lamp between control circuit terminal 1 and control circuit terminal 2.
- Press the lumbar switch in the Forward and Rearward directions. The test lamp should turn ON, when the switch is pressed in the Forward and Rearward directions.
- If the test lamp remains OFF for either direction, test the control circuits for a short to ground or an open/high resistance. If the circuits test normal replace the lumbar adjuster switch.
- If the circuits test normal replace the lumbar motor assembly.