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Help! Electrical problems! Why?! Why electrical problems ?!!!

yello80vette

Active member
Joined
Jun 29, 2007
Messages
43
Location
Columbus, OH
Corvette
1980 Frost Beige Corvette
OK, so the driver side power window on my frost beige 1980 has been acting up and slowing down over the past couple years but, hey the thing is 40 years old. Then suddenly, bang, it stopped working altogether. I think it's time to invest in a new motor.
The new power window motor arrives. Before installing it, lets plug it in to make sure it works. Nope. Nothing. I was afraid of this. I traced the wiring all the way back and it's in great shape. I plugged it in to the switch to the other window. Nope, The switch is good. Even checked all the fuses even though the passenger side window works fine. Fuses were fine. I'd rather deal with anything other than electrical problems because I always run into a dead end and truthfully I'm rather ignorant about electrical problems. Is there anyone . . . anywhere . . . that has any idea of what else I can check or what might be causing no power to the window motor ?! help... HELP !!!
 
Last edited:

bill81vette

Moderator
Joined
Jan 17, 2004
Messages
4,272
Location
Troy,NY
Corvette
1981 dark blue metallic
you need to ground the motor.
 

LLC5

Well-known member
Joined
Sep 28, 2004
Messages
2,299
Location
Wa.
Corvette
98 black 6spd convert.
Diagnosis is in order first. Find out what you are missing at the motor, battery positive or battery negative. I believe your master switch grounds one side of the circuit in the neutral position, check a wiring diagram to be sure.
 

Antz81

Well-known member
Joined
Dec 21, 2013
Messages
936
Location
Auckland, New Zealand
Corvette
1981 4 speed
Diagnosis is in order first. Find out what you are missing at the motor, battery positive or battery negative. I believe your master switch grounds one side of the circuit in the neutral position, check a wiring diagram to be sure.
The motor needs to be grounded as suggested above.
The motor has two windings one for up and one for down. The switch supplies +12v to either winding depending on the desired direction of travel.

On a side note it is possible that the slow movement is caused by the switch itself.
 

LLC5

Well-known member
Joined
Sep 28, 2004
Messages
2,299
Location
Wa.
Corvette
98 black 6spd convert.
The motor needs to be grounded as suggested above.
The motor has two windings one for up and one for down. The switch supplies +12v to either winding depending on the desired direction of travel.

On a side note it is possible that the slow movement is caused by the switch itself.


Ok, I wasn't what sure what year GM switched to grounding the field circuit of the motor windings through the switches.

Good info.
 

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