Power window motor replacement

[Les W.]

My 72 coupe passenger side window stopped 3/4 in the up position. After checking current to the motor being positive I have decided that the motor is shot. My problem is now to move the window into a position to align the holes in the regulator gear with the regulator arm so I can secure the regulator with a 5/16 bolt. How can I move the gears into the correct position so I can remove and replace the motor?

[Clem Z.]

Re: Power window motor replacement

My 72 coupe passenger side window stopped 3/4 in the up position. After checking current to the motor being positive I have decided that the motor is shot. My problem is now to move the window into a position to align the holes in the regulator gear with the regulator arm so I can secure the regulator with a 5/16 bolt. How can I move the gears into the correct position so I can remove and replace the motor?

try some hits on the motor while holding the switch in the up or down position. sometimes the brushes are not making good contact with the commutator and the shock will start the motor running

[Les W.]

Re: Power window motor replacement

Clem, I did try that a few times but no response. I thought about dismantiling the motor from the frame and gear assembly that is attached to the regulator gear. To make myself clear I am taking the electric assembly of the motor off the motors gear box. That way I may be able to turn the motor shaft to lower the window.

[Richard M.]

Re: Power window motor replacement

Les,

Just be very careful when you release the motor to do that.

The regulator has a very strong spring and could hurt you if your hand is in the wrong place when it releases. Put a block of wood jammed under the lower window frame before you take it apart.

Rich

[Wayne W.]

Re: Power window motor replacement

Hold the window so it dont guillotine you and remove the three bolts holding the retainer plate. The whole motor assembly will fall out. Then you can put the regulator anywhere you want it.

[Joe R.]

Re: Power window motor replacement

Whatever you do, listen to these guys when they tell you to be careful. I have a scar around my left index finger to prove their point. I'm just thankful my stupidity didn't cut my finger completely off!

JR

[Les W.]

Re: Power window motor replacement

Does anyone know how to move the window to align the holes of the regulator gear and the regulator arm? When the holes are aligned then a 5/16 bolt and nut can be used to hold the rgulator in place for motor replacement. I tried tapping the motor with a plastic mallet while engaging the switch--did not work. My next thought is to remove the electric portion of the power window motor to try to turn the shaft by hand. I am not even going to attempt to remove the motors mounting bracket/plate, because that plate is what holds the regulator spring tension to the best of my knowledge. I hope someone has had this problem that can help.

Les

[Mike R.]

Re: Power window motor replacement

I fought with non working motors and found that the mechanism can be removed in about any postion, its just a question of how much must be disassembled. I might be helpful to have someone hold the window up out of the was while you fight it. There are people who can overhaul your original motors.

Glad I'm done with that sort of stuff...

Mike

My 72 coupe passenger side window stopped 3/4 in the up position. After checking current to the motor being positive I have decided that the motor is shot. My problem is now to move the window into a position to align the holes in the regulator gear with the regulator arm so I can secure the regulator with a 5/16 bolt. How can I move the gears into the correct position so I can remove and replace the motor?

[Wayne W.]

Re: Power window motor replacement

It wont hurt you. Get someone to hold up on the window to keep it from falling and take the bearing plate off. Three little bolts.

[Les W.]

Re: Power window motor replacement

What do you think about pulling the motor off the power window motor assembly? I may not be explaining myself well at all. Look at it this way, if I had a new power window motor unit ready to replace the old unit sitting on my workbench, and I separarte to electric motor from its gear drive. Would that work to be able to turn the worm gear of the power window motors gear box by hand? I want to know if anyone thinks that might be possible to help move the window into place.

Les

[Wayne W.]

Re: Power window motor replacement

What do you think about pulling the motor off the power window motor assembly? I may not be explaining myself well at all. Look at it this way, if I had a new power window motor unit ready to replace the old unit sitting on my workbench, and I separarte to electric motor from its gear drive. Would that work to be able to turn the worm gear of the power window motors gear box by hand? I want to know if anyone thinks that might be possible to help move the window into place.

Les

You will most likely end up with two motors that dont work.

[Charles P.]

Re: Power window motor replacement

Are you 100% sure it isn't the switch? Sit in a darkened garage and actuate the switch forward and back with the interior courtesy lights on. If the lights dim it is likely the motor. I replaced a motor and later found out it was a bad switch.

Here is what your hands will be feeling when you reach through the access panel. This pic was taken on a door that had the fiberglass "skin" removed. Be sure you get a bolt and a nut through a hole to hold that regulator in place. I put a couple of strong clamps on the window also as an insurance policy.

[Les W.]

Re: Power window motor replacement

I did the interior light as you suggested and no dimming. I then disconected the lead into the motor and checked to see if I had 12 volts when activating the switch with a ground on the motor. Both contacts read a full 12 volts for up and down from the switch. I can only conclude that the motor is the problem. I just do not know how to move the regulator gear to align the holes.