So my Brat has always had pretty weak headlights, but lately they have been downright unreliable. My car runs completely fine, but when I go to turn the lights on at night, my headlights flicker off. When they turn off, I also hear a strange electrical sound (sounds like a servo or something like that). It doesn't happen every single time that I try to run my headlights, but pretty close. I don't think it's the battery, and I already took my alternator out and had it tested, but it passed the test just fine at O'Reilly's. Could it only be bad wiring that is doing this, or does anybody have any other ideas of what the problem might be?
p.s. The right headlight shines weaker than the left. I don't know if that is significant or not.
i have a 84 wagon , it did have weak headlights , and some other odd electrical wierdness. on a trip, during the night, at 60mph , they quit Completely!! and the volt gage says discharge, so i put a new alt , it made no difference at all. still no lights and guage showed discharge with headlight switch on , even though the lights were not on.
finally after a post here someone gave me a " check this " reply.
he described a ground wire to check , that had given him similar issues in his past.
it was a Main Ground Wire that was not hooked to anything!, it is located coming off the Main wiring harness inside the car where it comes through the firewall under the dash near the steering column , its a large black say 12 ga. wire approx 6inch long and had a large brass ring terminal on it. i am not sure that terminal was the original since mine was not connected , but it looked factory crimped . i think it was around 6-8 inches above the floor in the area around the column, but it was easy to locate once you get in there where you can inspect that main harness. you need to drop down the fuse panel , and the ecm , to get good access to the main wiring harness to find this ground.
once i found it and secured it to a good body bracket my electrical system and headlights and blinkers, guages , all were great, you should make an effort to check this very important ground wire to see if it is securely grounded.
i hope this might help, it sure saved my car.