Electronics Need help wiring something up? Thinking of adding an electrical component to your car? Need help troubleshooting that wiring glitch?

headlight troubles

Old Jul 21, 2011 | 09:53 PM
  #1  
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Car: 87 Gta
Engine: 5.3
Transmission: 4l60e
Axle/Gears: 3.42
headlight troubles

I have an 87 gta and of course the headlights won't come up. Had the motors checked out and they're not the problem. So anyone have some ideas?
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Old Jul 22, 2011 | 08:09 AM
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Re: headlight troubles

Oh and BTW the motors when turned by hand do work so should I re wire them?
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Old Jul 22, 2011 | 08:40 AM
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From: Central Texas
Car: GTA
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: Aussie 9-bolt/3.27 posi
Re: headlight troubles

You say you had the motors checked out. Checked out electrically? Will they go up/down by bypassing the dash switch? If so, maybe you just have a bad dash switch?
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Old Jul 22, 2011 | 05:10 PM
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Axle/Gears: 3.42
Re: headlight troubles

Yes I took them to somebody who rebuilds electric motors said they where great. So I would assume wiring. How would I go about by passing the switch, I mean everything else turns on just the headlights won't come up
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Old Jul 22, 2011 | 05:38 PM
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From: Central Texas
Car: GTA
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: Aussie 9-bolt/3.27 posi
Re: headlight troubles

To test the switch you would need to pull it out & see if power is going in & going out when it is supposed to.

And check the relay before you go through the hassle of pulling the switch. I should have suggested checking it first place. On the firewall in a 87, it is a dual relay. 1 box, 2 sets of inputs & outputs, so that if 1 side fails? One headlight still functions correctly.

It is just to the left of the brake booster & fairly commonly fails. Open the hood, turn the lights on & if the headlights down come up? Tap on the box. Not HIT, but a few firm taps.

You can buy a rebuilt one here:
http://www.top-downsolutions.com/hea...ird-p-119.html or find you a used one somewhere. Junkyard maybe? I have a spare but keep it in reserve for this exact reason!
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Old Jul 23, 2011 | 12:06 AM
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Car: 90 RS 'Vert, 88 IROC-Z, 88 Firebird
Engine: 305 ci tbi, 305 ci tpi, 350 ci tpi
Transmission: WC-T5, WC-T5, 700R4
Axle/Gears: 3.45, 3.27, 3.27
Re: headlight troubles

http://www.top-downsolutions.com/hea...pair-p-35.html

http://www.top-downsolutions.com/del...pair-p-87.html

Either of these headlight repair kits I make will solve the problem. What fails the first time on these 86-92 headlight motors is the bushings inside the gear. The bushings transfer the load from the gear to the 3-lobe hub that is staked onto the shaft that raises and lowers the headlight bucket.

Lon Salgren
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Old Jul 23, 2011 | 12:17 AM
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From: Central Texas
Car: GTA
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: Aussie 9-bolt/3.27 posi
Re: headlight troubles

Originally Posted by lonsal
http://www.top-downsolutions.com/hea...pair-p-35.html

http://www.top-downsolutions.com/del...pair-p-87.html

Either of these headlight repair kits I make will solve the problem. What fails the first time on these 86-92 headlight motors is the bushings inside the gear. The bushings transfer the load from the gear to the 3-lobe hub that is staked onto the shaft that raises and lowers the headlight bucket.

Lon Salgren
Ummm....If the **** will still raise & lower them manually, doesn't that point towards an electrical problem? Doesn't those kits you listed only apply to lift motors that fail to work even manually?
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Old Jul 23, 2011 | 12:01 PM
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Transmission: 4l60e
Axle/Gears: 3.42
Re: headlight troubles

Originally Posted by BlackenedBird
Ummm....If the **** will still raise & lower them manually, doesn't that point towards an electrical problem? Doesn't those kits you listed only apply to lift motors that fail to work even manually?
I will have to agree, that would be why I posted in electrical but I will for sure check on that as soon as I get motor back in and power to everything
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Old Jul 23, 2011 | 12:02 PM
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Axle/Gears: 3.42
Re: headlight troubles

Oh, and thank you very much
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