For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
DEFINITION: The Radio and the Driver Information Display's vacuum fluorescent displays do not dim when the Park Lamps are turned on.
1 | Did you perform the Lighting Diagnostic System Check? | -- | Go to Step 2 | Go to Diagnostic System Check - Lighting Systems
2 |

1. Turn the Headlights ON.
2. Vary the IP dimmer switch from minimum brightness to the full bright position.

Do the vacuum fluorescent displays vary in brightness?

--

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3 | Do any of the vacuum fluorescent displays vary in brightness? | -- | Go to Step 4 | Go to Step 5
4 | Test for an open in the Step Dim signal circuit to the inoperative component(s). Refer to Circuit Testing and Wiring Repairs in Wiring Systems. If an open circuit is not found, replace the inoperative component. Did you find and correct the condition? | -- | Go to Step 6 |
5 | Test for an open or short to ground in the Step Dim signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. If an open circuit or short to ground is not found, replace the Headlamp and IP Lamp Dimmer Switch. Refer to Headlamp Switch Replacement .

Did you find and correct the condition?

Go to Step 6

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