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2 Switches, 1 Relay

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=141347
Printed Date: May 12, 2025 at 8:33 PM


Topic: 2 Switches, 1 Relay

Posted By: pulsarman605
Subject: 2 Switches, 1 Relay
Date Posted: May 31, 2016 at 11:04 PM

posted_image
Very basic diagram ;-)

Want to know if this can be done with no complications. I have a switch up the front of the to control some LED lights in the back, but also want to able to switch from the back.

So in essence just hooking to switches to the trigger on a relay. Can this be done??

Cheers



Replies:

Posted By: i am an idiot
Date Posted: May 31, 2016 at 11:29 PM
The only problem with that is if either switch is in the on position the lights will be on. You can do it and have complete control from front and rear if you get 2 single pole double throw (On-On) toggle switches.

If you get those let me know and I will draw you a diagram.



Posted By: davep.
Date Posted: May 31, 2016 at 11:36 PM
i am an idiot wrote:
You can do it and have complete control from front and rear if you get 2 single pole double throw (On-On) toggle switches.

If you get those let me know and I will draw you a diagram.


Suggestion: Diagram it as a (-) control for the relay, and you only have to run two wires to the rear switch. Ground the common on the rear switch.



Posted By: pulsarman605
Date Posted: June 01, 2016 at 12:42 AM
That would be ok though. It will only ever be either switch.. never both.

ie... I will only ever use the front switch OR the rear switch. I understand if one of them is on then the lights will be on.

I already have the switches

One switch is 1NO1NC
Other is Single Pole Single Throw ON - OFF switch


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