For 1990-2009 cars

Step | Action | Normal Result(s) | Abnormal Result(s)*
--- | --- | --- | ---
1 | Turn the dimmer switch to the LOW position and the headlamp switch to the PARK position on the headlamp and the instrument panel (IP) lamp dimmer switch. |

• | The following components are activated:

- | The steering wheel radio control switches

- | The headlamp switch

- | The door lock switches

- | The window switches

- | The heater and A/C control

- | The instrument cluster

- | The ashtray lamp

- | The interior lamp

- | The multi-function switches

- | The rear window wiper/washer

- | The multi-function switches

- | The driver information switch

- | The rear door latch release actuator

• | The following vacuum fluorescent (VF) displays step dim:

• | The radio display

• | The radio rear seat audio control display

• | The driver information display

• | The instrument cluster display

• | Instrument Panel Lamps or Vacuum Fluorescent Displays Inoperative

• | Instrument Panel Lamps Inoperative - One

• | Vacuum Fluorescent Display Do Not Dim with Park Lamps On

• | Radio Switch Illumination Inoperative

2 | Turn the dimmer switch slowly to the HIGH position on the headlamp and the IP dimmer switch. |

• | The brightness of the IP lamps slowly increase to HIGH.

• | The brightness of the VF displays slowly increase to HIGH.

• | Instrument Panel Lamps Erratic with Dimmer Switch

• | Vacuum Fluorescent Displays Do Not Change Intensity - All

3 |

1. Turn the dimmer switch to the OFF position.
2. Turn the park lamp switch to the OFF position.

• | The IP lamps turn to the OFF position.

• | The VF displays turn to the OFF position.

• | Instrument Panel Lamps Erratic with Dimmer Switch

• | Vacuum Fluorescent Displays Do Not Change Intensity - All

*Refer to appropriate Symptom Diagnosis for the applicable results.