Electrical Headlights, Turn Signals, Hazards Don't Work

jrichker said:

Check the wiring connectors for the multifunction switch. There may be a loose ire or one that overheated and damaged things.

Multifunction turn signal switch:
Before you think about replacing the multifunction switch with one from the junkyard, here are some things to be aware of...

The problem is more common in GT models because they had fog lights on the same power wiring as the headlights. Ford undersized the wire and that caused problems.

A word of caution about multifunction switches is in order here. The multifunction switch (high/low beam, wiper, turn signals) are different for different years. 87-98 will work in any 87-89 car. The 90-93 switches only work in 90-93 cars. You can't put an early model switch in a late model car, nor can you put a late model switch in an early car.

Supposedly you can move the pins around to make the switches work in model years that are different from the car the switch came out of. I cannot verify that and haven’t tried it.

Other possible problem sources for the turn signal & headlight malfunction are the ignition switch, multifunction switch and the plastic shell that holds the turn signal wiring connector pins.

Click to expand...

ARBOC39 said:

Do you happen to have page 13-11and 149-1 From that diagram book? Reference is in the top right of top photo, the headlight switch testing. Thanks

Click to expand...