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safecar horn or siren

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=113138
Printed Date: May 16, 2025 at 12:46 PM


Topic: safecar horn or siren

Posted By: twank27
Subject: safecar horn or siren
Date Posted: April 14, 2009 at 1:41 PM

how do i wire up a relay to  boost the power of the horn i am trying to install it on my car with a two wire toogle switch



Replies:

Posted By: howie ll
Date Posted: April 14, 2009 at 4:23 PM
One side of switch to ground, other side to relay 85. 12v+ from battery via a 20amp fuse to 86 and 87 of relay. 30 to horn, other terminal of horn to ground.


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