need to break a circuit with a 12v feed

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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=78091
Printed Date: April 29, 2024 at 5:34 AM

Topic: need to break a circuit with a 12v feed

Posted By: maxedmini
Subject: need to break a circuit with a 12v feed
Date Posted: May 21, 2006 at 1:23 PM

hi there the problem i have is........
i need a constant live feed until the brake lights are on so i need a circuit to break the live when a 12v is pressent then return to a constant live when the brake lights go out

thanks

Replies:

Posted By: Hoptup32
Date Posted: May 21, 2006 at 3:15 PM

posted_image

Your constant 12v feed is connected to terminal 30 and is output thru terminal 87a, this will provide a constant 12v feed to whatever circuit you require when you are not applying the brakes. Connect a wire from the output side of the brake light switch to terminal 86, when you apply the brakes, the relay will interrupt your constant 12v feed until you release the brakes.

Posted By: maxedmini
Date Posted: May 22, 2006 at 6:35 PM

thanks m8 will try it out

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