For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
1 | Did you perform the Lighting System Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Lighting Systems
2 | Inspect the PARK LP fuse. Is the fuse open? | Go to Step 3 | Go to Step 4
3 | Repair a short to ground in CKT 1340. Is the repair complete? | Go to Step 9 | --
4 |

1. Turn the headlamp/instrument panel (IP) lamp dimmer switch to the PARK position.
2. Use a test light in order to backprobe the headlamp/IP lamp dimmer switch harness connector between terminal R and ground.

Did the test lamp light?

Go to Step 8

Go to Step 5

5 | Use a test light in order to backprobe the headlamp/IP lamp dimmer switch harness connector between terminal O and ground. Did the test lamp light? | Go to Step 6 | Go to Step 7
6 | Replace the headlamp/IP lamp dimmer switch. Refer to Headlamp Switch Replacement . Is the repair complete? | Go to Step 9 | --
7 | Repair the following conditions in CKT 1340 between the PARK LP fuse and the headlamp and the IP lamp dimmer switch harness connector terminal O:

• | A faulty connection

• | An open circuit

Is the repair complete?

Go to Step 9

--

8 | Repair the following conditions in CKT 9 between the headlamp and the IP lamp dimmer switch harness connector terminal R and S204:

• | A faulty connection

• | An open circuit

Is the repair complete?

Go to Step 9

--

9 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2