Electrical Problems

[Weaponrider]

I have a 91 Mustang GT and last night the dash lights quit working, I replaced the fuse and they started to work again for about 5 min. and then quit working again. I checked the fuse again and it wasnt blown! Now I dont have tail lights, parklamps, cruse control, or dashlights. I know that there has to be something in that circuit, but i cant seem to find a wiring diagram that i can actually see. Also i wanna know if anybody else has had this problem? and what all could be wrong in the circuit?
thanks!

 

[HISSIN50]

Check fuse 4.

If it has power on both sides, I'd check the terminals on the headlight switch itself.


Good luck.

 

[jrichker]

Possible bad dash light dimmer switch. You'll need a multimeter or
DVM to measure the resistance of the dimmer as you move the thumbwheel.

The following is from a 93 model, maybe it will be close enough to be helpful.