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Old Sep 25, 2005 | 08:27 PM
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Default One headlight dim

I just changed my driver side headlight lift motor with a rebuilt one on my 99TA. Now the driver side headlight is dimmer than the passenger side! And on top of it, when I turn on the high beams, the left headlight goes out altogether.

I checked the fuses and they are OK. All headlights have the same resistance (none are burned out).

I compared the voltages coming out of the chassis wiring harnesses that go into the headlight harness. The driver side is about 11.5-12 volts while the passenger side is more like 13.5-14 volts (so the driver side lights see less voltage). What would cause these voltages to be different? Does the computer control any of this?

Any help would be appreciated, I've been working on this all day.

Thanks,

Joe
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Old Sep 25, 2005 | 08:52 PM
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Mine did the exact same thing and it turns out I had a little corrosion in the harness connector for that headlight.
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Old Sep 25, 2005 | 10:21 PM
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Originally Posted by Mustang5.Ohater
Mine did the exact same thing and it turns out I had a little corrosion in the harness connector for that headlight.
Thanks for the input. Where did you find the corrosion? Before or after the harness?
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Old Sep 26, 2005 | 05:00 PM
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Inside the harness that carries the power to the headlight and to the headlight motor.
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Old Sep 26, 2005 | 11:08 PM
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Originally Posted by Mustang5.Ohater
Inside the harness that carries the power to the headlight and to the headlight motor.
Do you mean the one that can be removed with the headlight motor, or the one mounted to the car?
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Old Sep 28, 2005 | 10:52 AM
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Didn't find any corrosion, cleaned up the connections anyway. Anybody else have an idea?
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Old Sep 28, 2005 | 08:01 PM
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Originally Posted by black99ta
Didn't find any corrosion, cleaned up the connections anyway. Anybody else have an idea?
Check for a bad ground off that light, be my first choice.
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Old Oct 1, 2005 | 01:08 PM
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Do you know where the grounds are?
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Old Dec 23, 2005 | 09:32 PM
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Default fixed it!!

OK, finally got this thing sorted out. The pin (for ground) going from the headlight motor harness was not contacting the female connection in the chassis harness. I bent it a little bit to make sure it made contact and problem fixed.

By the way, this caused all kinds of symptoms such as all four lights on for low beams, driver sided high beam turning off, left side light dim etc. Just a heads up for anyone else who runs into this same thing.

Joe
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Old Dec 23, 2005 | 10:09 PM
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good job!!
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