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headlight problems! Im stumped!

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Old Dec 5, 2008 | 08:59 PM
  #1  
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From: stockton - Near Sac. Town Cali
Default headlight problems! Im stumped!

ok...i cant figure out why this dang headlight wont work. the driverside headlight will not go up or down. tested the motor. works fine. nothings jaming the arm since i manually move it up at night and it comes up with no additional amount of resistance.

checked the fuses. working fine, not blown out.

so after that i figured i had a bad headlight module. got a new one. same problem so its not a bad module.

checked and cleaned the grounds on the frame rails right behind the headlights. clean and secured.

the only thing i can think is that one of the wires is pinched or cut.

Im totally lost. dont know what the heck to do.

anyone have any ideas or how to fix!?
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Old Dec 5, 2008 | 09:44 PM
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Have you check the drive gear on the motor to see if the teeth are stripped? does the motor run if disconnected from the headlight assembly if not is there power to the motor ?
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Old Dec 5, 2008 | 09:47 PM
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Originally Posted by rockgoped
ok...i cant figure out why this dang headlight wont work. the driverside headlight will not go up or down. tested the motor. works fine. nothings jaming the arm since i manually move it up at night and it comes up with no additional amount of resistance.

checked the fuses. working fine, not blown out.

so after that i figured i had a bad headlight module. got a new one. same problem so its not a bad module.

checked and cleaned the grounds on the frame rails right behind the headlights. clean and secured.

the only thing i can think is that one of the wires is pinched or cut.

Im totally lost. dont know what the heck to do.

anyone have any ideas or how to fix!?
I would not change any more parts until you have gone through the wiring diagram and isolated the issue.
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Old Dec 6, 2008 | 12:06 AM
  #4  
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gear



oh .....................and one cheap nylon gear.............
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Old Dec 8, 2008 | 04:11 PM
  #5  
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ok. it has to be the wire. it has to be pinched somewhere between the headlight module and the driver side headlight connection. i used a volt meter to test the current. theres current coming from the module but not making it to the driver side. my conclusion is a pinched wire.

its not the motor or the gears. hooked it up and the motor runs. its a signal issue.
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Old Dec 8, 2008 | 10:11 PM
  #6  
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The usual cause is a failing headlamp switch itself.
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Old Dec 9, 2008 | 07:25 PM
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I agee with headlight switch. I had the same problem with my 99. I changed the switch out and it worked perfectly.
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Old Dec 9, 2008 | 08:44 PM
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If it was the Headlamp switch, it would affect both sides. If I understand the OP correctly, the right side is working correctly.

BH
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Old Dec 9, 2008 | 08:47 PM
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Might try switching fuses #3 and #4, in underhood fuse block.

BH
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Old Dec 9, 2008 | 11:15 PM
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I was thinking that the headamp switch has a switch for each headlamp but I could be wrong and it would make sense to only need one.
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Old Dec 9, 2008 | 11:31 PM
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Not sure if this is related to your problem, but in rebuilding the front of my 01 Z06 I chased headlight problems for days, the headlights would open, but not close..........after many hours of pulling my hair out, i decided to check to see if the lights themselves would work......in replacing the bulbs, I discovered that a blown bulb will allow the lights to open, but they will not close until the blown bulb is replaced.....scared the crap out of me when they suddenly closed......but still a happy moment, lol.
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