1977 Power Windows Help Needed!!!
Thread Starter
Navigator
Joined: Mar 2008
Posts: 9
Likes: 0
From: Columbus MS
1977 Power Windows Help Needed!!!
Hey there.. I have read all the Chiltons and Haynes Manuals, but have exhausted all hopes except for an expert on here.
My 77's driver's side window will not work. I took the motor/regulator out, hooked it to a battery, and nothing. BUT... If I have the thing hooked to a battery and kind of "short" the motor housing across the door frame, it comes to life. That leads me to believe that it's not being grounded.
SHouldn't it ground when it's bolted securely to the door? I need help here guys (and gals). This is befuddling me something terrible.
Thanks in advance, 77fixer..
My 77's driver's side window will not work. I took the motor/regulator out, hooked it to a battery, and nothing. BUT... If I have the thing hooked to a battery and kind of "short" the motor housing across the door frame, it comes to life. That leads me to believe that it's not being grounded.
SHouldn't it ground when it's bolted securely to the door? I need help here guys (and gals). This is befuddling me something terrible.
Thanks in advance, 77fixer..
Le Mans Master
Joined: May 2002
Posts: 5,086
Likes: 786
From: Lebanon Township New Jersey
When you have the motor out of the door you have to ground it and apply 12 volts for it to work. In the door, it is grounded by its bolted connection. It still need 12 volts to work. I had a bad wire on my 77. The window would not go up, but it worked going down. Use a grounded test light on the two connections in the plug in the door.
Last edited by BKbroiler; Jan 25, 2009 at 08:12 PM.
Melting Slicks
Joined: Dec 2006
Posts: 2,669
Likes: 3
From: Kingston Ontario
Does the passenger side window work?
Both motors get power through the relay. If your passenger side works then you have a wiring problem or switch problem on the drivers side. You can check switch by substituting with the other switch.
Most common failure of wiring is a break at the door grommet area.
Both motors get power through the relay. If your passenger side works then you have a wiring problem or switch problem on the drivers side. You can check switch by substituting with the other switch.
Most common failure of wiring is a break at the door grommet area.
Last edited by dannyman; Jan 25, 2009 at 07:59 PM. Reason: correction
Thread Starter
Navigator
Joined: Mar 2008
Posts: 9
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From: Columbus MS
What I've done is reinstalled the motor/regulator and am hooking jumper cables to it directly bypassing the switch/interior wiring.
For some reason, it isn't grounding. Is there some other way to ground the motor?
For some reason, it isn't grounding. Is there some other way to ground the motor?
Drifting
Joined: Jun 2005
Posts: 1,523
Likes: 1
From: grand prairie texas
I hope this don't sound dumb but you do know that the two wires on your motor one terminal runs the window up and the other terminal runs the motor down I am assuming by saying you hooked up jumpers that the negative/ground goes to the door or the motor and the other jumper goes to either one of the two motor motors.
Instructor
Joined: Sep 2008
Posts: 222
Likes: 0
From: penngrove ca
Run a temp. seperate ground from a know good ground to the motor. Check both up & down operation. This will tell you if it is indeed a ground problem.
You could check your ground by using a trouble light. Ground on window motor, pos. to batt.
You could check your ground by using a trouble light. Ground on window motor, pos. to batt.
