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GM Power Windows

Printed From: the12volt.com
Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=67040
Printed Date: June 09, 2024 at 5:09 AM


Topic: GM Power Windows

Posted By: qute
Subject: GM Power Windows
Date Posted: November 26, 2005 at 2:28 AM

Hi guys,

I have a 74 Holden (Aussie) ute (think early 70's Chev El Camino) and am putting power windows in it. I have looked through lots of the site, but can't find the answer to my question.

I have an El Camino power window switch in the console and the window motors are the same Delco units as the US 70 - 80 model F bodies use, I believe.

My problem is that the motors do not use reversed polarity for up and down. They have a separate feed for each function and earth through the door/body.

Being a ute (or pick-up) room is at a premuim too. Is there a way to only use 1 relay per window or do I have to use 2?

Thanks...Dave



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Cheers...Dave



Replies:

Posted By: qute
Date Posted: November 26, 2005 at 4:15 AM
I should have mentioned above that I would prefer to have the relays between the switches and motors to minimise the power going through the switches.

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Cheers...Dave




Posted By: Mike M2
Date Posted: November 26, 2005 at 7:44 AM

Yes, 2 relays per window. If the switch is anything like a 70's El camino, in reality you could wire them direct using no relays. Back then GM 5 wired the switch directly to the motor, but if you want to minimize the power at the switch, it's 2 relays per door...



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Mike M2
Tech Manager
CS Dealer Services




Posted By: qute
Date Posted: November 26, 2005 at 7:50 AM

Thanks Mike, that's what I thought.

I know the switches will handle the current draw, but I like to minimise the amount of "high" power going into and around the cab and wondered if there was an "either/or" relay available that would do the job.

Looks like I'll need to buy a couple more relays and make up an extended mount for them under the dashboard.



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Cheers...Dave





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