Electrical issue

SAVAGE12131

MEMBER
1984 PONTIAC FIERO
2.5L
4 CYL
RWD
MANUAL
95,000 MILES

Was driving last night went over a set of rough tracks and lost all my lights. I have reverse lights and warning lights like door ajar cooling light seat belt light etc.
I have tried jumping the headlight switch no power to anything interior or exterior, but will fire right up no hesitation and will run and drive with no issue at all I have traced every inch of wire I could see and cannot find. Anything I need to know what could cause this and how id go about fixing it?

1 Reply

JDL

MECHANIC
16,098 POSTS

For interior lamps check courtesy fuse in fuse box. My information says hot all the time, so use a test-light and check for voltage on fuse leg. Hopefully your fuse box is labeled so you know which fuse is which? Usually on older vehicles the headlamps do not use a fuse, there is an internal circuit breaker in headlamp switch. Sorry, my wiring information for your vehicle is not very good.
For you outside lamps, like tail--park lamps, they are fuse protected, check the fuse in the fuse box for voltage. You may have fusible links, that you need to check. Check chassis grounds. Grounds are important as well as voltage.