Cascade Crew

alloy · Posted: Mon Apr 05, 2010 12:38 am Post subject: Headlight problems

Ok, Daisy has a headlight problem. The headlights go on and off. The light switch was pretty loose and a couple of time I got ht lights to go off messing with it, so I replaced it. Same with the dimmer switch. But I still have the off and on problem. Only the headlights do this, the tail. dash and markers do not go off. So it's a power problems on the headlight circuit only. Both high and low beams are affected.

I've looked and tried to find a relay and also a wiring diagram for an 89 maro, but no luck. Does anyone have a copy of a link to the wiring diagram for the headlight circuit? And does anyone know if there is a breaker on the headlight circuit?

Al Hasse · Posted: Mon Apr 05, 2010 4:11 am Post subject:

The switch itself has a bi-metallic thermal breaker in it, as most GM cars do. 30 amp IIRC. You can either replace the switch or install a pair of relays on the harness to have the battery directly hooked to the lights (properly fused of course), similar to aftermarket fog lights.

aaron_sK · Posted: Mon Apr 05, 2010 6:22 am Post subject:

alloy · Posted: Mon Apr 05, 2010 8:43 am Post subject:

As I mentioned the headlight switch has been replaced. I did the stand alone harness in my car, didn't want to go that way with this one. Just want to fix the stock setup for now.

alloy · Posted: Mon May 10, 2010 9:05 am Post subject:

Well finally found the breaker for the headlights. Was hidden down between the fender and the body. Like someone stuffed it down there. I could hear it but not find it, but eventually I traced the wires and pulled the harness up and there it was.

Anyway I replaced it and it kept popping off. Obviously an overload on the circuit making it do that. I traced the harness out and there were no visible signs of worn wires toughing anywhere, so I just made me a new harness. Found a great diagram on TGO for it. Made it a little easier not having to think about the design of it. Lights are much brighter now and they stay on like they should

BigDaddyVu · Posted: Mon May 10, 2010 9:29 pm Post subject:

are you using aftermarket headlights ie H-4's?

91camaro_rs · Posted: Mon May 10, 2010 10:21 pm Post subject:

BigDaddyVu · Posted: Tue May 11, 2010 4:13 pm Post subject:

don't foget to repin you headlight connectors

alloy · Posted: Tue May 11, 2010 4:41 pm Post subject:

Just stock headlights on this car.

Twilightoptics · Posted: Tue May 11, 2010 4:59 pm Post subject:

H4s on stock wiring can burn out the wiring and or the switch.

Always relay and with larger gauge wire.