For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Lighting System Diagnostic System Check? | -- | Go to Step 2 | Go to Diagnostic System Check - Lighting Systems
2 | Is the inoperative lamp in the radio control switches? | -- | Go to Radio Display/Illumination Inoperative with Park Lamps On in Entertainment | Go to Step 3
3 |

1. Turn the headlamp switch to the PARK position and the dimmer switch to the HIGH position on the headlamp and the instrument panel (IP) dimmer switch.
2. Use a test lamp in order to backprobe between the inoperable lamp harness connector CKT 8 and ground.

Did the test lamp light?

--

Go to Step 5

Go to Step 4

4 |

1. Repair the following conditions in CKT 8 between S203 and the inoperable component.

• | A poor connection

• | An open

2. Inspect the system

Is the repair complete?

--

Go to Step 8

--

5 | Use a test lamp in order to backprobe the inoperable lamp harness connector between CKT 8 and the following ground circuits:

• | CKT 750

• | CKT 1450

• | CKT 1550

• | CKT 150

• | CKT 650

Did the test lamp light?

--

Go to Step 7

Go to Step 6

6 |

1. Repair the following conditions in the ground circuit between the inoperable component (CKT 750, CKT 1450, CKT 1550, CKT 150 or CKT 650) and G200, G302 and G401:

• | A poor connection

• | An open

2. Inspect the system.

Is the repair complete?

--

Go to Step 8

--

7 |

1. Replace the bulb/inoperable component.
2. Inspect the system.

Is the repair complete?

--

Go to Step 8

--

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