relay wiring and fusing

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=141648
Printed Date: May 13, 2025 at 5:18 AM

Topic: relay wiring and fusing

Posted By: bbcmonte
Subject: relay wiring and fusing
Date Posted: August 27, 2016 at 6:31 AM

i have a project car that im working on and i want to add push button switches for the windows and door locks. Can anyone tell me whats the proper way to wire and fuse the relays?

Replies:

Posted By: howie ll
Date Posted: August 27, 2016 at 10:37 AM

Try this:-
locks_and_windows.png

Please note this applies to ONE window, you will need two of these for two windows etc.
For the locks, above will suffice, join the motor wires.
Note, the higher fuse for 2 windows, the lower fuse for two locks.
Ground in the body, NOT the door.
Out of interest you'd be better off using a proprietary lock relay/timer such as SPAL or DAV or even complete kit, this gives you an option to lock/unlock from the driver's door.

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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: bbcmonte
Date Posted: August 27, 2016 at 11:21 AM

thanks man..any recommendation on a good kit to use?

Posted By: howie ll
Date Posted: August 27, 2016 at 3:56 PM

SPAL or DAV for locks, SPAL also do window kits. Google them, they both have US distributors.

-------------
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: i am an idiot
Date Posted: August 27, 2016 at 8:41 PM

You need power on terminal 86 of both relays. Howie's picture is missing a red line.

Posted By: howie ll
Date Posted: August 28, 2016 at 1:24 AM

Thanks Craig.

-------------
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: bbcmonte
Date Posted: August 28, 2016 at 2:43 PM

well my car already have power windows so buying the i think will be a waste. i going with a custom door panel and i pretty much just want to change the switches to a more modern look