can a relay be used to cut power?
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=136661
Printed Date: April 28, 2024 at 8:47 PM
Topic: can a relay be used to cut power?
Posted By: Catfish45
Subject: can a relay be used to cut power?
Date Posted: May 18, 2014 at 11:58 PM
I'm not sure if a relay is what I need, if not maybe someone can point me in the right direction. I need a way to have power run through a wire until ground is applied to a relay, switch, etc causing the power wire to lose Contact, killing power to the rest of the wire. Hopefully that makes sense. Thanks!
Replies:
Posted By: Catfish45
Date Posted: May 19, 2014 at 12:01 AM
Oh this needs to be more of an automated process, when I say switch it can't be one that has to be thrown manually.
Posted By: howie ll
Date Posted: May 19, 2014 at 12:42 AM
Standard wiring using a 5 pin relay.
Ignition to 86, ground to 85 power in 87a, out 30.
86 must be ignition or ACC otherwise the relay will drain the battery.
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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: oldspark
Date Posted: May 19, 2014 at 1:37 AM
Or as I understand it, a self-latching relay as per here (9th post) where the "off switch" contact is 87a & 30 of a 5-pin/SPDT relay with 86 to +12V & 85 top your GND off switch.
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