Head Light Motor Testing
Thread Starter
Joined: Nov 2010
Posts: 5,892
Likes: 84
From: Mantua NJ
Car: 1 Owner 1986 TA with a WS6 package
Engine: 5.0 EFI
Transmission: THM700R4
Axle/Gears: 277 Posi Speedo
Head Light Motor Testing
I'm trying to test a set of headlight motors to make sure their good,how would I go about that??
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Joined: Sep 2010
Posts: 1,928
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From: Georgetown TX
Car: Base 91 'bird
Engine: 3.1 v6
Transmission: 4L60
Axle/Gears: 9-bolt 3.27 & PBR
Re: Head Light Motor Testing
Connect them to a 12v battery. Motor should spin. Then swap wires to opposite terminals and motor should spin the other way.
Thread Starter
Joined: Nov 2010
Posts: 5,892
Likes: 84
From: Mantua NJ
Car: 1 Owner 1986 TA with a WS6 package
Engine: 5.0 EFI
Transmission: THM700R4
Axle/Gears: 277 Posi Speedo
Re: Head Light Motor Testing
This is what I did,I unplugged my headlight motors and plugged the ones that need to tested and they run,but are they supposed to keep spinning.the motors started to run with the headlight switch in the off position.Are they supposed to do this,because they aren't installed yet.
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iTrader: (1)
Joined: Sep 2010
Posts: 1,928
Likes: 1
From: Georgetown TX
Car: Base 91 'bird
Engine: 3.1 v6
Transmission: 4L60
Axle/Gears: 9-bolt 3.27 & PBR
Re: Head Light Motor Testing
They'll keep spinning as long as they have power. However, there should be no power to the motors with the switch off and the lights all the way up or down. The control module sends power to pop them up or down but cuts the power when they hit the end of their travel. You may need to trace back to the relay and then the control module etc. That's on my '91. Not sure if it makes a difference but what year do you have?
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