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Troubleshooting Headlight Motor
Thread Starter
Racer
Joined: Feb 2000
Posts: 497
Likes: 0
From: Boise Idaho
Troubleshooting Headlight Motor
Does anyone know how to troubleshoot the headlight motor? I have taken apart the motor and the bushings are intact and perfect. Is there a way to diagnose if the motor has burnt out? TIA
Instructor
Joined: Feb 2006
Posts: 112
Likes: 0
From: Vandenberg AFB California
Sure,
Put direct current to the plug from the battery. If it moves, it isn't the motor. If it doesn't, then it is the motor. Remember to hook ground to ground or nothing will happen.
Put direct current to the plug from the battery. If it moves, it isn't the motor. If it doesn't, then it is the motor. Remember to hook ground to ground or nothing will happen.
Team Owner
Joined: Oct 2000
Posts: 96,443
Likes: 9
From: Fort Knox, KY
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Also, check your Corvette's headlight opening actuator module. It's located on the driver's side and is bolted to the outer molding of the front fender well.
Intermediate
Joined: Nov 2005
Posts: 28
Likes: 0
From: South Carolina
First you need a volt meter and you need to find the power wire going into the module. Then turn the headlight switch off and on while checking the power wire and the two wires coming out of the module and going to your headlight motors. You may need to cut the plastic loom out of the way to check the wires and to trace them to the motors. When I checked mine one motor was getting power where the other one wasn't so I have to buy a new module.
Last edited by Bossman89; Oct 6, 2006 at 01:18 PM.
Safety Car
Joined: Feb 1999
Posts: 3,504
Likes: 4
From: Mexico Beach FL
Originally Posted by Black'92
Onedef, how do you go about in checking the opening actuator module?
It has one input from the light switch and an individual output to each headlight motor.
So, if either headlight motor is functioning, you know the input is OK.
If only one headlight motor isn't working, the best way I have found to check it is to disconnect the motor wiring at the headlight and put power (12 volts) directly to the motor to see if it will operate.
Tom Piper
Instructor
Joined: Feb 2006
Posts: 112
Likes: 0
From: Vandenberg AFB California
My headlight actuator was bad and I know it says don't repair it, but I figured as long as I was going to replace the $160 part, I wanted to make sure that was what was wrong.
When I got it apart, there was a fried wire and a loose one. I replaced the fried wire, resoldered both and the module has been working fine for about 3 months now.
Sure beats spending $160.
When I got it apart, there was a fried wire and a loose one. I replaced the fried wire, resoldered both and the module has been working fine for about 3 months now.
Sure beats spending $160.
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