put the new doors on - The 1947 - Present Chevrolet & GMC Truck Message Board Network

hotrodhomi · 05-15-2005, 10:26 AM

I changed the doors on my ’81 and put some on from a ’90 burb. The new doors have PW and PL. The PL work get but I’m having problems with the PW. Can someone explain this? I have 12V to the common side of the switch at all times. When I press the switch up or down I have power to both sides of the switch. WTF. If I disconnect the PW motor then I have power on one contact when I press up and I have power at the other contact when I press down. This seams right. Can anyone at explain to my why I have power on both contacts when I press up or down on the switch and the motor is hooked up?

hotrodhomi · 05-15-2005, 11:41 AM

Any one know how to take the motor out of the door? I loosened the four bolts that I thought held it in but it didn't budge.

Russell · 05-15-2005, 12:24 PM

You also need to drill out a couple of rivets to remove the motor

There is an article that outlines a bunch of important steps to this on www.73-87.com

hotrodhomi · 05-15-2005, 12:32 PM

Than looks like a PITA. Anyone have any ideas on the power issue?

Bagd74Jimmy · 05-16-2005, 04:18 PM

A power window works just like a door lock acuator does. When one wire gets 12v the other needs to get ground, when this happens the window motor will move up or down, depending on configuration. I believe the common power wire going to the switch should be purple, could be wrong. If you want I can draw a diagram on how to get the windows to work with relays and 4 momentary switches and e-mail it to you.

f.monroe · 05-16-2005, 05:36 PM

Sounds like it is just missing the gorund .You have 12 volts on each terminal but what do you have when you check across the terminals . What you have now is probably just a circuit looking for a ground . The 12 v will feed through the motor all the way to where it suppose to go to ground . Frank

hotrodhomi · 05-16-2005, 06:32 PM

So do you think I should take the doors off and scuff up the hinges to ensure I have a proper ground to the body? I think I’ll try and use a jumper wire on it first.
thanks.

crawdad · 05-16-2005, 08:15 PM

hotrodhomi I hope you don't mind if I slide in a related question on your post. My electric windows work, but at a VERY slooooooooooow pace. What would cause this? Could that also be a ground problem?

hotrodhomi · 05-17-2005, 09:41 AM

I checked the ground on my window motors yesterday. It was about .1ohm so that definitely not the problem. I also unhooked the right motor and tried to get the left side to work and vise versa. still no worky. Does someone have a wiring diagram for a '91 suburban? I wonder if one of the wires I cut that went to the back doors has anything to do with it. All things point to two bad motors but that’s a lot of work to get them out. I want to be sure about it.

hotrodhomi · 05-17-2005, 09:42 AM

crawdad: a bad ground could do it. also if your track is misaligned or pinching the window.

05-15-2005, 10:26 AM	#1
hotrodhomi Registered User Join Date: Apr 2004 Location: Sacramento Posts: 3,737	put the new doors on I changed the doors on my ’81 and put some on from a ’90 burb. The new doors have PW and PL. The PL work get but I’m having problems with the PW. Can someone explain this? I have 12V to the common side of the switch at all times. When I press the switch up or down I have power to both sides of the switch. WTF. If I disconnect the PW motor then I have power on one contact when I press up and I have power at the other contact when I press down. This seams right. Can anyone at explain to my why I have power on both contacts when I press up or down on the switch and the motor is hooked up?

05-15-2005, 12:24 PM	#3
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	You also need to drill out a couple of rivets to remove the motor There is an article that outlines a bunch of important steps to this on www.73-87.com __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

05-16-2005, 04:18 PM	#5
Bagd74Jimmy Registered User Join Date: Apr 2005 Location: San Antonio, Texas Posts: 28	A power window works just like a door lock acuator does. When one wire gets 12v the other needs to get ground, when this happens the window motor will move up or down, depending on configuration. I believe the common power wire going to the switch should be purple, could be wrong. If you want I can draw a diagram on how to get the windows to work with relays and 4 momentary switches and e-mail it to you. __________________ 1974 GMC Jimmy ( on 'bags by the end of summer ) 1959 Chevy LWB Stepside

05-16-2005, 05:36 PM	#6
f.monroe Senior Member Join Date: May 2004 Location: Caldwell,Tx. Posts: 3,648	Sounds like it is just missing the gorund .You have 12 volts on each terminal but what do you have when you check across the terminals . What you have now is probably just a circuit looking for a ground . The 12 v will feed through the motor all the way to where it suppose to go to ground . Frank Last edited by f.monroe; 05-16-2005 at 05:38 PM.

05-16-2005, 08:15 PM	#8
crawdad Senior Member Join Date: Sep 2004 Location: Georgia Posts: 614	hotrodhomi I hope you don't mind if I slide in a related question on your post. My electric windows work, but at a VERY slooooooooooow pace. What would cause this? Could that also be a ground problem? __________________ 2012 Silverado LT 1500, 5.3, 6 speed auto '86 SWB C-10 Silverado

05-15-2005, 11:41 AM	#2
hotrodhomi Registered User Join Date: Apr 2004 Location: Sacramento Posts: 3,737	Any one know how to take the motor out of the door? I loosened the four bolts that I thought held it in but it didn't budge.

05-15-2005, 12:32 PM	#4
hotrodhomi Registered User Join Date: Apr 2004 Location: Sacramento Posts: 3,737	Than looks like a PITA. Anyone have any ideas on the power issue?

05-16-2005, 06:32 PM	#7
hotrodhomi Registered User Join Date: Apr 2004 Location: Sacramento Posts: 3,737	So do you think I should take the doors off and scuff up the hinges to ensure I have a proper ground to the body? I think I’ll try and use a jumper wire on it first. thanks.

05-17-2005, 09:41 AM	#9
hotrodhomi Registered User Join Date: Apr 2004 Location: Sacramento Posts: 3,737	I checked the ground on my window motors yesterday. It was about .1ohm so that definitely not the problem. I also unhooked the right motor and tried to get the left side to work and vise versa. still no worky. Does someone have a wiring diagram for a '91 suburban? I wonder if one of the wires I cut that went to the back doors has anything to do with it. All things point to two bad motors but that’s a lot of work to get them out. I want to be sure about it.

05-17-2005, 09:42 AM	#10
hotrodhomi Registered User Join Date: Apr 2004 Location: Sacramento Posts: 3,737	crawdad: a bad ground could do it. also if your track is misaligned or pinching the window.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.