Adding door lock switch, relay question

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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=41774
Printed Date: May 17, 2025 at 11:42 PM

Topic: Adding door lock switch, relay question

Posted By: cavyinthegarage
Subject: Adding door lock switch, relay question
Date Posted: October 27, 2004 at 9:44 PM

hello, I just purchased the spal door lock switch, I want the switch to only work when the ignition is on. So can I use a relay to change the polarity <ign wire +>
to - trigger on the switch side without harming the alarm brain or actuators. So If I can change the polarity I see how to do that on the left. thanks

Replies:

Posted By: auex
Date Posted: October 28, 2004 at 11:32 AM

Shouldn't be hard. Wire the switch to pass ign +12V. Then 2 relays for 5 wire locks. But wire 85 as ground and 86 as switch.

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