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Old 06-21-2006, 11:14 PM   #1
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1992 Headlight Rotation Failure

Hello every one this is my first post.

I have a question pertaining to my headlights not rotating. let me start by telling you what i have proven to be known good. I had an issue a week ago with getting my left head light to come up whereas my right side did rotate as it should. So I went ahead and tried the left hand motor on the right side and still no rotation. So i went ahead and bought a new lefthand motor tonight and put it in and upon turning the the light switch on, the lights come on but niether light rotates.

I think I might have shorted out something when I plugged in the lefthand motor to the right side wiring.

I did put 12v to each motor, left/right side and got the motors to rotate up and back down indicating the motors in both sides were operating 100%. It may have been the case that my lefthand motor was straight up shot or maybe It caused something else to short.

I couldn't find a fuse that could cause this in the fuse panel, so the only other part based on what I saw is the "Headlight Module," "Headlight Actuator," "Headlight Relay." that could be cause for failure. This is a 160 dollar part so i want someone with similar expierence to comment on what they think the problem could be prior to spending that amount on a random fix. Thanks guys!

Word is this is what control the actual rotation:
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Old 06-21-2006, 11:26 PM   #2
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Have you checked the relay? Not sure on a 92, but on my 89 they were by the battery...
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Old 06-21-2006, 11:33 PM   #3
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The only relay I can find avail. goes up to 1990 Corvettes. Are there seperate relays I need to look for?
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Old 06-22-2006, 04:11 AM   #4
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Do this inexpensive test first: do the headlights rotate ok when the hood is open? If they do without a problem you need to check this:

I had this problem: when hood closed the lights might open or not. Rebuilt the motors but no help. In the end the solution was simple: the big wire harness connectors are supposed to be attached down by the front bumper. Both mine were broken and hang lose. Sometimes they interfered with the lights, like drive to a pothole and the lights dont open for couple of days, or just the right side or or... They dont need much resistance to give up, I guess there is a safety mechanism so the motors wont burn if the lids are stuck.

So, my easy fix was to make sure the harneses cannot get in the way of the lights. Not a single problem since.
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