For 1990-2009 cars

Step | Action | Normal Result(s) | Abnormal Result(s)*
--- | --- | --- | ---
1 |

1. Turn the headlamp switch OFF.
2. Apply a bright light to the daytime running lamps (DRL) ambient light sensor.
3. Turn the ignition to RUN.

The high beam headlamps turn on at a reduced intensity in approximately 30 seconds.

• | Headlamps On in Daylight Conditions

• | Headlamps, Daytime Running Lamps (DRL) Off, Ignition in RUN (Park Brake Applied)

• | Headlamps Do Not Switch Intensity

2 | Cover the DRL ambient light sensor with a dark cloth. | The following conditions occur in approximately 15 seconds:

• | The high beam headlamps turn off.

• | The low beam headlamps turn on.

• | The exterior lamps turn on.

• | Headlamps Inoperative in Low Light Conditions

• | Headlamps Do Not Switch Intensity

3 |

1. Turn the ignition OFF.
2. Apply the park brake.
3. Apply a bright light to the DRL ambient light sensor.
4. Turn the ignition to the RUN position.

• | The headlamps are off.

• | The exterior lamps are off.

Headlamps, Daytime Running Lamps (DRL) On With Park Brake Applied

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.