Power window motor replacement
Thread Starter
Melting Slicks
Joined: Dec 2009
Posts: 3,229
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From: Thunder Bay
Power window motor replacement
The drivers side power window motor has failed (again) on my '79. I replaced it a couple of years ago with a rebuilt unit. This time I think I'll try the new unit. Problem is the motor has failed with the window in the down position. As I recall I need to have the window halfway down to lock it in position with a bolt in order to change the motor. What is the best way to get the window to the halfway position with the motor not working?
Melting Slicks
Joined: Oct 2001
Posts: 2,064
Likes: 1,382
From: Halifax, Nova Scotia, Canada
The drivers side power window motor has failed (again) on my '79. I replaced it a couple of years ago with a rebuilt unit. This time I think I'll try the new unit. Problem is the motor has failed with the window in the down position. As I recall I need to have the window halfway down to lock it in position with a bolt in order to change the motor. What is the best way to get the window to the halfway position with the motor not working?
With the motors out I lubed the rollers and tracks and moved the windows freely up and down in the tracks. The window would stay where you put it. I don't understand the purpose of the bolt requirement for changing the motors.
If you were to play with the spring, then you would need some precautions.
Pro
Joined: Jul 2014
Posts: 568
Likes: 64
From: Sebastian,FL
Im fairly certain your only going to need the bolt to hold the regulator if you remove the motor without having the weight of the window and spring in place. The gear on the motor and gear on the regulator will hold, or atleast it did when I had mine apart. I had a lower bracket break on my regulator which made it loose it's ground which of course gave the exact impression of a dead motor and it stopped all the way down.
Thread Starter
Melting Slicks
Joined: Dec 2009
Posts: 3,229
Likes: 656
From: Thunder Bay
I have done this a couple of times before but its been a while. I have always used a bolt to lock the window in place to prevent it from dropping while the motor is out. Here is a quote from Corvette Magazine on the subject:
"Now it is time to remove the window motor, you must be cautious here as injury can result if you don’t follow these steps. You need to roll the window down approx half way and you will have to either feel with your finger or get a small mirror to place in the door. You are looking for a hole in the main regulator gear that will align with a hole in the main section of the regulator that bolts to the door. Once these are aligned you need to install a bolt through them and tighten it down. This will keep the regulator from moving when you remove the motor. Do not skip this step, if you remove the motor without this step you will either hurt yourself or you could even put a hole through your door. Once you have the bolt in place you can remove the three bolts that hold the motor to the regulator"
I just need to figure out how to get the window half way up to put the bolt in.
"Now it is time to remove the window motor, you must be cautious here as injury can result if you don’t follow these steps. You need to roll the window down approx half way and you will have to either feel with your finger or get a small mirror to place in the door. You are looking for a hole in the main regulator gear that will align with a hole in the main section of the regulator that bolts to the door. Once these are aligned you need to install a bolt through them and tighten it down. This will keep the regulator from moving when you remove the motor. Do not skip this step, if you remove the motor without this step you will either hurt yourself or you could even put a hole through your door. Once you have the bolt in place you can remove the three bolts that hold the motor to the regulator"
I just need to figure out how to get the window half way up to put the bolt in.
Pro
Joined: Jul 2014
Posts: 568
Likes: 64
From: Sebastian,FL
Have you tried applying power directly to the motor to see if it might be coaxed into moving with a little extra juice. I removed my door glass when I was repairing mine, then I removed my regulator with motor attached. My spring was missing so removing the motor from the regulator didn't require any bolt to hold it from releasing the tension. If I am remembering it correctly I think it would have been more difficult to remove the motor from the regulator while still in the door.
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,753
From: Charlotte NC
CORRECT...NO BOLT is needed IF the motor is serviced WITH the door glass still in the car and attached to the regulator.
YES..sometimes I use my battery charger and set at HIGH amps and try to shock the motor to move...IF that does not work...then the FUN begins in trying to get the window OFF so I can get it out and then the motor off or the regulator out with it still attached.
DUB
YES..sometimes I use my battery charger and set at HIGH amps and try to shock the motor to move...IF that does not work...then the FUN begins in trying to get the window OFF so I can get it out and then the motor off or the regulator out with it still attached.
DUB
Thread Starter
Melting Slicks
Joined: Dec 2009
Posts: 3,229
Likes: 656
From: Thunder Bay
CORRECT...NO BOLT is needed IF the motor is serviced WITH the door glass still in the car and attached to the regulator.
YES..sometimes I use my battery charger and set at HIGH amps and try to shock the motor to move...IF that does not work...then the FUN begins in trying to get the window OFF so I can get it out and then the motor off or the regulator out with it still attached.
DUB
YES..sometimes I use my battery charger and set at HIGH amps and try to shock the motor to move...IF that does not work...then the FUN begins in trying to get the window OFF so I can get it out and then the motor off or the regulator out with it still attached.
DUB
