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

Headlights - motor or relay?

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Old Mar 1, 2006 | 11:31 AM
  #1  
magadith's Avatar
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From: San Diego CA
Car: 83 Trans-Am (Recarro)
Engine: 305 4bbl
Transmission: 5 speed manual
Headlights - motor or relay?

I don't know which would be the problem. My lights will only pop up only after I hit the switch like 5-15 times. The motors doesn't continue to spin after there up so the gears must be fine. so can it be the relay even though they will pop up after a few tries?
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Old Mar 1, 2006 | 02:26 PM
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From: lakewood colorado
Car: 84-92 firebirds
Engine: 2.8/3.1
Transmission: auto
could be a sticking relay or worn brushes on the motor switch. Don't rule out the gears so quick - once they engage the motor will stop when the light goes up. Have someone hit the switch while you look at the motor - if it spins when the switch is on, but does'nt move it's the gears.

The actual headlight switch could be dirty and not making good contact. Do the lamps light up when you hit the switch?
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Old Mar 1, 2006 | 03:49 PM
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magadith's Avatar
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From: San Diego CA
Car: 83 Trans-Am (Recarro)
Engine: 305 4bbl
Transmission: 5 speed manual
Originally posted by 8492bird
could be a sticking relay or worn brushes on the motor switch. Don't rule out the gears so quick - once they engage the motor will stop when the light goes up. Have someone hit the switch while you look at the motor - if it spins when the switch is on, but does'nt move it's the gears.

The actual headlight switch could be dirty and not making good contact. Do the lamps light up when you hit the switch?
The lights do light up when I hit the switch.
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Old Mar 1, 2006 | 03:53 PM
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From: lakewood colorado
Car: 84-92 firebirds
Engine: 2.8/3.1
Transmission: auto
Then the switch is probably OK. If both headlights are doing the same thing, then it could be the master relay.http://www.autozone.com/servlet/UiBr...3d801eef19.jsp

Last edited by 8492bird; Mar 1, 2006 at 03:57 PM.
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Old Mar 1, 2006 | 05:12 PM
  #5  
magadith's Avatar
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From: San Diego CA
Car: 83 Trans-Am (Recarro)
Engine: 305 4bbl
Transmission: 5 speed manual
Originally posted by 8492bird
Then the switch is probably OK. If both headlights are doing the same thing, then it could be the master relay.http://www.autozone.com/servlet/UiBr...3d801eef19.jsp
Yeah, both are doing the same thing. will check out the master relay...Thanks : )
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Old Mar 19, 2006 | 12:52 PM
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From: Long Island
Car: 1985 Trans Am/ Recaro w/webbed headrests (AS5)?
Engine: Code F
Transmission: 700, shame, ain't it?
Axle/Gears: 3.27 Borg-Warner posi
other thread

There is another thread where I wrote a paragraph on exactly how the relay headlight system works. The chillton's wiring diagram is also quite definitive on the subject when it comes to colors and function. The thread is "firebird headlights" under user "dillardracer".
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Old Mar 20, 2006 | 11:17 AM
  #7  
magadith's Avatar
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From: San Diego CA
Car: 83 Trans-Am (Recarro)
Engine: 305 4bbl
Transmission: 5 speed manual
Yup, it was the Isolation (master) relay. I went to the junk year and pulled a few of them since they were dealership parts.
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Old Mar 20, 2006 | 10:20 PM
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From: Long Island
Car: 1985 Trans Am/ Recaro w/webbed headrests (AS5)?
Engine: Code F
Transmission: 700, shame, ain't it?
Axle/Gears: 3.27 Borg-Warner posi
good news

Glad I could lend a hand, at the risk of egotism, saving people's asses is my claim to fame!
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