Faulty Headlight Module
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Joined: Apr 2017
Posts: 90
Likes: 14
From: St Louis
Faulty Headlight Module
Recently, my right headlight decided to stop raising up completely. I replaced the motor bushings years ago, and those haven't given me a single issue since. The left still works fine, and to add insult to injury, even if I manually raise the right one, the motor still works fine for lowering it. Light itself works fine on that side. While troubleshooting the control module, manually grounding out the module restores full operation briefly, but it only lasts a day or two before the issue comes up again. I purchased a replacement control module thinking this would solve the issue, but when I put the new module in, none of the motors worked in any capacity. Is this simply due to a bad part, or is there something more causing this?
Thread Starter
Advanced
Joined: Apr 2017
Posts: 90
Likes: 14
From: St Louis
The module monitors the current draw by the motor. When the door is fully up or down, the module detects the additional current and turns off. It seems your RH motor is increasing draw to the "turn-off" threshold prior to being fully open. So it may well be mechanical.
One test would be to power the RH motor from the LH circuit. Run temporary wires between the LH car harness connector and the RH motor connector. Give it a go.
I don't have opinion as to why the new module didn't work at all. These haven't been available for many years. You may have been sold a used and defective part.
One test would be to power the RH motor from the LH circuit. Run temporary wires between the LH car harness connector and the RH motor connector. Give it a go.
I don't have opinion as to why the new module didn't work at all. These haven't been available for many years. You may have been sold a used and defective part.
