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Old 07-15-2002, 01:58 PM
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Join Date: May 2000
Location: Georgetown, MA
Posts: 84
Testing window regulator

I have been working on my 86 300E. I am trying to test the motor to determine if it is shot. The wiring diagram shows two hot wires to the motor. Power feed to individual wire determines motor rotation. It seems that the switch turns one of the wires to a ground depending on required rotation of motor. If my assumption is correct then I have a broken ground wire. Can I directly connect one wire to hot and the other to ground on the battery to test the motor?
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Old 07-15-2002, 09:30 PM
WRM WRM is offline
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Join Date: Jun 2002
Location: BURBANK CA
Posts: 151
if it is a rear window, you need to use the green & black wire at the switch.
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Old 07-19-2002, 10:20 PM
grey500se's Avatar
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Join Date: Nov 2001
Location: VA 20 miles west of D.C.
Posts: 245
yes you can test the motor that way, switch it to test the opposite direction, your right the control switch's switches the polarity according to direction desired
1994 Ford Taurus SHO
1999 Kawasaki Ninja ZX9R
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Old 07-20-2002, 11:20 AM
J.HIDALGO's Avatar
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Join Date: Jul 1999
Location: Jax, FL
Posts: 1,785
What exactly is your problem?

I have the same vehicle, may be I can help you!
'86 300E
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