Circuit/System Testing
- Ignition OFF, remove the appropriate park lamp bulb and inspect.
- If bulb is faulty, replace bulb.
- Disconnect the harness connector at the appropriate headlamp assembly or tail lamp assembly.
- Test for less than 5 Ω between the appropriate lamp assembly ground circuit harness connector listed below and ground.
- E13L Headlamp Assembly - Left ground circuit harness connector terminal 1
- E13R Headlamp Assembly - Right ground circuit harness connector terminal 1
- E5E Tail Lamp - Left ground circuit harness connector terminal F
- E5F Tail Lamp - Right ground circuit harness connector terminal F
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Connect a test lamp between the appropriate park lamp control circuit harness connector listed below and ground.
- E13L Headlamp Assembly - Left control circuit harness connector terminal 4
- E13R Headlamp Assembly - Right control circuit harness connector terminal 4
- E5E Tail Lamp - Left control circuit harness connector terminal A
- E5F Tail Lamp - Right control circuit harness connector terminal A
- Command the appropriate Park Lamp test 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 control 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 control 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 and bulbs test normal, replace the appropriate headlamp assembly or tail lamp assembly.