window switch, do i need a relay

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Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=124001
Printed Date: May 23, 2024 at 3:26 AM

Topic: window switch, do i need a relay

Posted By: oilspot
Subject: window switch, do i need a relay
Date Posted: October 19, 2010 at 7:25 AM

I apologize for being very green in the electronics dept.
I'm working on installing power windows in the front doors of my car. I have all the motors/ regulators etc. I just picked up a set of window switches from a 2000 something mazda protege. I'm trying to figure out if they require a relay or if they are designed to carry a heavy load.

How would I figure this out?

Replies:

Posted By: Velocity Motors
Date Posted: October 19, 2010 at 7:38 AM

When in doubt, use a relay and fuse the power wire at a lower rated fuse.

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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA

Posted By: oilspot
Date Posted: October 19, 2010 at 4:08 PM

yeah better safe then sorry! Only factor that keeps me from just running relays is that that takes 4 relays, and the best price I've found them for around here is a little shy of 10 bucks, and This college student gig I'm doing right now doesn't pay well :).
The switch will only reside about 4 inches also so relays will not save much in larger guage wiring.

I'm currently looking for a wiring diagram for a 1998 mazda protege. I found some other year diagrams where it looks like they're wired direct. I def wanna make sure before i proceed with this project.

Posted By: godd dan it
Date Posted: October 21, 2010 at 2:20 AM

I installed factory power windows in my truck and used only one 30/40 amp relay. It was only for the front 2 windows. Everything works fine. Just use like 12-14 gauge wire too.

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