dpdt switch

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=131108
Printed Date: May 09, 2025 at 3:46 PM

Topic: dpdt switch

Posted By: nboog
Subject: dpdt switch
Date Posted: April 02, 2012 at 8:13 PM

Could I use a dpdt momentary switch with this setup, or would I need a spdt momentary switch?
posted_image

Replies:

Posted By: i am an idiot
Date Posted: April 02, 2012 at 9:25 PM

You can use a dpdt switch, but you will use only one pole of said switch.

Posted By: nboog
Date Posted: April 02, 2012 at 9:50 PM

so I would cap off one side, or would I wire them together?

Posted By: i am an idiot
Date Posted: April 02, 2012 at 10:18 PM

No need to cap off the unused 3 terminals. You can use both poles if you wish.

Posted By: nboog
Date Posted: April 04, 2012 at 6:47 PM

so both the positives from the relays would go to both on prongs on the switch, and the off would be grounded?

Posted By: howie ll
Date Posted: April 04, 2012 at 7:04 PM

Connect nothing to ground because at rest the grounds would be fed to the relays.

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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: i am an idiot
Date Posted: April 04, 2012 at 11:02 PM

Let me look for a picture.

Posted By: howie ll
Date Posted: April 05, 2012 at 1:51 PM

It has just occurred to me that with a DPDT switch you wouldn't even need relays.

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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: hotwaterwizard
Date Posted: April 05, 2012 at 8:39 PM

posted_image

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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !

Posted By: nboog
Date Posted: April 06, 2012 at 10:05 AM

Awesome thank you guys very much!

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