Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the appropriate turn signal lamp.
- Test for less than 5 Ω between the appropriate turn signal lamp ground circuit harness connector listed below and ground.
- E4RF Turn Signal Lamp - Right Front ground circuit harness connector terminal 1
- A9A Outside Rearview Mirror - Driver ground circuit harness connector terminal 4
- E4LF Turn Signal Lamp - Left Front ground circuit harness connector terminal 1
- A9B Outside Rearview Mirror - Passenger ground circuit harness connector terminal 4
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Connect a test lamp between the appropriate turn signal lamp control circuit harness connector listed below and ground.
- E4RF Turn Signal Lamp - Right Front circuit harness connector terminal 2
- A9A Outside Rearview Mirror - Driver circuit harness connector terminal 16
- E4LF Turn Signal Lamp - Left Front circuit harness connector terminal 2
- A9B Outside Rearview Mirror - Passenger circuit harness connector terminal 16
- Command the appropriate Turn Signal Lamp test ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
- If the test lamp is always ON, test the Signal circuit for a short to voltage. If the circuit tests normal, replace the K9 Body Control Module.
- If the test lamp is always OFF, test the Signal circuit for a short to ground or an open/high resistance. If the circuits test normal, replace the K9 Body Control Module.
- If all the circuits test normal, replace the appropriate turn signal lamp.