Using relays to turn radio on remotely

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=48439
Printed Date: May 12, 2025 at 4:57 AM

Topic: Using relays to turn radio on remotely

Posted By: sykoaudio
Subject: Using relays to turn radio on remotely
Date Posted: January 24, 2005 at 1:01 AM

I was wondering if anybody knows how to use relays to turn on the radio via a remote. If someone could give me a diagram, I would greatly appreciate it. Thanks, Chris

Replies:

Posted By: Mwsounds
Date Posted: January 24, 2005 at 11:51 AM

Basically, all you have to do is use a channel on your alarm. Connect it to a relay that will pass 12volts to you radio when activated. I had a 6 channel expander for my alarm. I used it co control neons, strobes, and my fog lights. Was pretty cool. This site has diagrams for the relays.

85 goes to ground

86 goes to alarm channel (+) to activate relay.

30 connects to B+ (12 volts)

87 connects to the radios igintion wire to turn it on. (This terminal is for normally open) This terminal connects to 30 when activated.

87a won't be used (this terminal is for normally closed)

Hope this helps.

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Thanks,
Mike Ward
Get it done right the first time!

Posted By: Xplorer
Date Posted: February 01, 2005 at 10:16 PM

Would u just splice the 87 wire to the ignition wire then? would the radio turn on by pushing the power button on the radio still?...i was looking to do the same thing.

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Peace

Posted By: Xplorer
Date Posted: February 01, 2005 at 10:25 PM

What exact type of relay should be used in this situation?

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Peace