automatic light sensor not working properly - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

eckstei4 · 08-19-2009, 17:38

can anyone tell me what would cause the sensor that turns on the lights at night to stop working properly? by this I mean my running lights will still come on but not my headlights.

2000 sable.

tomw · 08-20-2009, 06:06

The 97 had a module built into the headlamp switch and a sensor that detected ambient light, an amplifier and a relay in the fuse box controlled by the sensor amplified voltage.
So, three things: the relay, the sensor/amplifier module, and the headlamp switch. Plus all the appropriate fuses.
If you really want the details, try to find the EVTM manual for your car. It is definitely worth its cost. Electrical Vacuum Troubleshooting Manual

tom