Circuit/System Testing
WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the P16 Instrument Cluster.
- Verify that a test lamp does not illuminate between the ignition circuit terminal 8 and ground.
- If the test lamp illuminates
Repair the short to voltage on the ignition circuit.
- If the test lamp does not illuminate
- If the test lamp illuminates
- Ignition ON.
- Verify that a test lamp illuminates between the ignition terminal 8 and ground.
- If the test lamp does not illuminate and the Ignition fuse is good
- Ignition OFF, remove the test lamp.
- Test for less than 2 Ω in the ignition circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If less than 2 Ω, refer to Power Mode Mismatch (Without KL9) Power Mode Mismatch (With KL9) .
- If the test lamp does not illuminate and the Ignition fuse is open
- Ignition OFF, remove the test lamp.
- Test for infinite resistance between the ignition circuit and ground.
- If less than infinite resistance, repair the short to ground on the circuit.
- If infinite resistance, replace the P16 Instrument Cluster.
- If the test lamp illuminates
- Replace the P16 Instrument Cluster.