Headlight wiring

NoDOHC · 07-11-2011, 06:39 PM

Try reaching under the car and turning the little knob on the headlight motor, sometimes a twist is all it needs. If mine has been sitting for a long time, I have to do this sometimes until the motors get some use and the corrosion goes away.

(In other words, in may be a clearing switch, not a wiring problem).

FRED · 07-12-2011, 12:19 PM

It shouldn't be that hard to figure out. Pull the plug off the unit. Turn the headlights to UP. With a meter check the R/L or red/blue wire for power. Should be there.

Then put the headlights to Down and check the R/Y or red/yellow wire for power. Should be there.

And check the pure black wire for showing less than one ohm.

Check the White/Green for power 24/7. Should be there. IF all four are there.........motors the problem or the relays in the motors.

Wiring diagrams are usually off by themselves in the FSM. Or sometimes it pays to go to the Body Electrical part of the FSM for trouble shooting.

07-11-2011, 06:39 PM	#1
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin Posts: 855 Rep Power: 18	Try reaching under the car and turning the little knob on the headlight motor, sometimes a twist is all it needs. If mine has been sitting for a long time, I have to do this sometimes until the motors get some use and the corrosion goes away. (In other words, in may be a clearing switch, not a wiring problem). __________________ 1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)

07-12-2011, 12:19 PM	#2
FRED Rotary Fan in Training Join Date: Mar 2011 Posts: 73 Rep Power: 15	It shouldn't be that hard to figure out. Pull the plug off the unit. Turn the headlights to UP. With a meter check the R/L or red/blue wire for power. Should be there. Then put the headlights to Down and check the R/Y or red/yellow wire for power. Should be there. And check the pure black wire for showing less than one ohm. Check the White/Green for power 24/7. Should be there. IF all four are there.........motors the problem or the relays in the motors. Wiring diagrams are usually off by themselves in the FSM. Or sometimes it pays to go to the Body Electrical part of the FSM for trouble shooting.