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

headlights won't come up until I hit a bump

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Old Feb 6, 2008 | 06:35 PM
  #1  
89mulletbird's Avatar
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From: San Diego, CA
Car: 89 GTA
Engine: 6.0L Procharged
Transmission: T-56
Axle/Gears: 4.10
headlights won't come up until I hit a bump

I'm not sure if this issue is in the switch or the headlight units. Sometimes when I turn on the headlights, they don't pop up until I hit a bump in the road and jar something loose. Any ideas?
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Old Feb 6, 2008 | 11:12 PM
  #2  
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From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Re: headlights won't come up until I hit a bump

Yes, get ahold of Lon at http://www.top-downsolutions.com/ He's a firebird headlight expert and he's nearby to us in SoCal.
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Old Feb 6, 2008 | 11:59 PM
  #3  
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From: Hacienda Heights, CA
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: headlights won't come up until I hit a bump

Problem:
Originally Posted by 89******bird
...Sometimes when I turn on the headlights, they don't pop up...
Solution: TDS 209280 Deluxe Headlight repair kit.

http://www.top-downsolutions.com/pro...products_id=87



Lon
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Old Feb 7, 2008 | 12:06 AM
  #4  
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From: Silverado, CA
Car: 2002 Camaro z28
Engine: LS1
Transmission: 4L60E
Axle/Gears: 2.73 stock, stock, stock
Re: headlights won't come up until I hit a bump

I can vouch for Lon's headlight repair kit. Fixed my driver's side headlight with NO problems. Great product. I've never met the guy, but he knows what he's talking about.
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Old Feb 7, 2008 | 09:16 AM
  #5  
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Car: '91 Z28 convertible
Engine: TPI
Transmission: T5
Axle/Gears: 3.27 posi disc
Re: headlights won't come up until I hit a bump

This might be actually an electrical problem, not mechanical.
Sounds like loose wiring or components.
The healight motors are controlled by a "black box" on the firewall, right by the windwhield wiper motor. Also, each headlight has another separate relay (usually close to the headlight). I'd check those out. Turn on the headlights and if they don't pop up, give the black box and relays a whack or wiggle the wires. If it corrects the problem, it's a bad connection.

Hope this helps.
Lou
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Old Feb 10, 2008 | 02:17 PM
  #6  
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From: Bertram (outside Austin), TX
Car: 87 GTA
Engine: L98
Transmission: 700R4
Axle/Gears: Dana M78 3.27 posi
Re: headlights won't come up until I hit a bump

Yep. If it is the control box, and most likely it is, the lights will come up after hitting a bump. I've been through that before.

If your lights won't come up, pop the hood, and tap on it the motor control box on the firewall. It they pop right up, it's the control box. I swapped mine out after going through this, then rebuilt my first one as a spare.
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Old Feb 10, 2008 | 03:58 PM
  #7  
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From: Marengo,IA
Car: 89 Firebird
Engine: 2.8L out of a 89 camaro
Transmission: 5 speed
Axle/Gears: ?
Re: headlights won't come up until I hit a bump

i ordered that kit from lon and it works great... lights come up.. problem is mine don't go down.. and ive replaced the control box..
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Old Feb 10, 2008 | 05:30 PM
  #8  
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From: Hacienda Heights, CA
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: headlights won't come up until I hit a bump

Problem: Headlights won't go down. Solution: blown tail light fuse.

Lon
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