Door trigger cutting stereo 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=44290
Printed Date: May 01, 2024 at 7:26 PM

Topic: Door trigger cutting stereo power

Posted By: xmxer13
Subject: Door trigger cutting stereo power
Date Posted: December 02, 2004 at 12:59 PM

I need a diagram on how to wire my stereo so that when you shut off the key, the stereo will still work until a door is opened.

Replies:

Posted By: auex
Date Posted: December 02, 2004 at 6:15 PM

Radio on till door open.

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Posted By: xmxer13
Date Posted: December 03, 2004 at 11:14 AM

Thats what I was looking for, thanks.

Posted By: djtrace
Date Posted: December 26, 2004 at 2:57 PM

I got a question about this diagram, if I wire it like this wil the stereo turn back on as soon as I close the door?

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Posted By: Teamrf
Date Posted: December 26, 2004 at 10:51 PM

I think once the connection is broke it is broke until power is supplied back to the radio.

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Posted By: 2intrigues
Date Posted: December 27, 2004 at 9:03 AM

Teamrf wrote:

I think once the connection is broke it is broke until power is supplied back to the radio.

Exactly. The relay on the left is configured as a latch. It gets its coil power from its own output contact. When the relay on the left drops out (because the relay on the right picked up), the relay on the left loses power to its coil. The relay on the left cannot pick up until power is applied to the radio again via the accessory power circuit.

Posted By: murrr77
Date Posted: January 08, 2005 at 12:34 PM

Maybe this is a really dumb question...but I'm going to try to use this to keep my satellite radio on in my 02 Trailblazer just like the factory radio stays on until the door opens.

What would I use for (-) door trigger?

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