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How to test 74 vette wiper motor

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Old 03-05-2013, 05:52 PM   #1
Dave Tuten
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Default How to test 74 vette wiper motor

Hi Ya'll,

Have a 74 vette wiper motor out of the car and on the workbench. I put 12 volts to the blue and then yellow lead terminals and negative to the black terminal. Thought this would turn the arm or at least something but nothing....Also, there is a plastic connector on top of wiper that looks like three hoses attach to.....not sure how that works and not sure if I need this in order to test wiper motor. Any help would be greatly appreciated.
Also, is there any good service manuals on this year model, with picture breakdowns that you would recommend? And, what is AIM?

Thanks, Dave T.
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Old 03-05-2013, 06:37 PM   #2
my 76 ray
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Wilcox has testing instructions on his site. I used them and they were great. The one thing I do remember is that the negative (ground) is actually connected to the body of the wiper motor.

Click on "Supporting documentation" once you get the page up.

http://willcoxcorvette.com/repairand...lp.php?hID=285

Last edited by my 76 ray; 03-05-2013 at 06:43 PM.
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Old 03-05-2013, 06:39 PM   #3
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The 3 hose connection is your windshield washer pump and not needed for your bench test.

The AIM is the assembly Instruction Manual
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