Symptom Chart

WARNING: This page is about a different car, the 2005 Mercury Mountaineer and 2005 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM CHART

Condition	Possible Sources	Action
The daytime running lamps are inoperative	Circuitry. Parking brake signal switch and bracket. Daytime running lamps (DRL) module.	GO to PINPOINT TEST A .
The daytime running lamps are on with the parking brake set	Circuitry. Parking brake signal switch and bracket. DRL module.	GO to PINPOINT TEST B .
The daytime running lamps are on with the ignition switch off	Circuitry. Ignition switch. DRL module.	GO to PINPOINT TEST C .
The daytime running lamps are inoperative - the low beam headlamps are on at full intensity in DRL mode	Circuitry. Headlamp switch. DRL module.	GO to PINPOINT TEST D .