power windows need to use relays?

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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=122973
Printed Date: May 14, 2024 at 11:26 PM

Topic: power windows need to use relays?

Posted By: oilspot
Subject: power windows need to use relays?
Date Posted: August 04, 2010 at 11:24 PM

I have a 89 civic that i want to install power windows in. I already have the window motors and frame assembly's. I either plan on getting some window switches from a junkyard or I may order a new aftermarket set.

I'm only wiring the two front windows. Each will be controlled individually (I don't mind leaning over to put up the passenger window).
I've been reading for a while. From what I've read many people are saying that the use of relays is necessary. Other people are saying that relays aren't needed if you use the right switches. That's when vague mentions like (520t) get thrown in.

I have no idea what I need, or where I can buy it.
Can anybody clear up what i need, and where I can get it.

Replies:

Posted By: KPierson
Date Posted: August 05, 2010 at 10:35 AM

You can use relays with low current switches or you can use high current switches.

Me, personally, would use standard Bosch style relays and momentary up/down switches.

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Kevin Pierson

Posted By: howie ll
Date Posted: August 05, 2010 at 2:50 PM

DAV switches from Spal are made for power windows, no need for relays, why not put the switches on the centre console, therefore no need to lean over and the wiring is much simpler.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Posted By: oldspark
Date Posted: August 05, 2010 at 10:22 PM

What both above said!

A central location with rated switches is simplest. And if howie II reckons Spals are good....

Otherwise I am no fan of heavy currents through auto-switches. Besides, that means heavy wiring everywhere (if mounted in each door & remotely etc).
I prefer lighter switches (of my liking) that control remote relays. (And it's easier to add extra control points - like auto-closers or switch bypasses.)
And they are just plain relays (timing or current sensing off is a control circuit issue - not for timer or delay relay).

Alas no single "correct" answer - it's one of those "it depends on the situation and preference/s".