Driver side power window motor self grounded?
Thread Starter
Racer
Joined: Jun 2011
Posts: 319
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From: Harrison Ohio
Driver side power window motor self grounded?
Is there a ground wire in the door? replacement motor good grounded motor housing to battery and positive wir eto one of the terminals and motor work. Have 12 volts on 1 of the terminals when switch moved and other side of meter grounded but motor still does not work still. i have yet to remove and test switch but based on meter reading it is good. Am i missing something?
Le Mans Master
Joined: Aug 2006
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From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Yes the motor case is the ground, with the cased grounded apply 12 volts to one terminal on the end, the motor will turn one way, apply 12 volts to the other terminal and the motor turns the other way.
You can't confirm what is bad using the switch (since it could be the problem).
Use a separate jumper wire.
Could also be a broken wire between the door and frame.
Regards, Pete.
You can't confirm what is bad using the switch (since it could be the problem).
Use a separate jumper wire.
Could also be a broken wire between the door and frame.
Regards, Pete.
Le Mans Master
Joined: Jan 2006
Posts: 9,192
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From: Boca Raton Florida
Sometimes the ground through the door hinge isn't good enough, its pretty easy to add a ground wier between the door and door frame. The window switches are in a terrible place, they collect all kinds of dirt and crap.
Safety Car
Joined: Oct 2007
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From: Austin Texas
Corvette of the Year Winner 2017
2016 C3 of Year Finalist
the orginal design depends on the door being grounded,
another poor design on a fiberglass car !
Run Gnd wires to each door motor, motor test is simple if grounded.
1 terminal 12volts for up
the other terminal 12v for down.
and yes there is a relay that delivers power to the switches,
when the key is in the on position.
another poor design on a fiberglass car !
Run Gnd wires to each door motor, motor test is simple if grounded.
1 terminal 12volts for up
the other terminal 12v for down.
and yes there is a relay that delivers power to the switches,
when the key is in the on position.
Team Owner
Joined: Jan 2006
Posts: 37,637
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From: Crossville TN
NOTHING in a Corvette is "self-grounded". A good, solid ground wire/strap, of adequate size for the current being passed, is necessary for every electrical feature on the car. (...unless it is attached to the car's frame or birdcage, which requires its own grounding cable)
