trigger with alarm

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=107311
Printed Date: July 15, 2025 at 7:52 AM

Topic: trigger with alarm

Posted By: Matrix7333
Subject: trigger with alarm
Date Posted: September 08, 2008 at 4:41 PM

Hello all, I have a CodeAlarm CA670 and would like to have my strobes flash when the alarm triggers. I currently have the strobe hooked to a SPST switch, one leg have 12v with 3 amp fuse and the other leg connects to the strobe control wire.

I guess I have to have a relay setup that triggers from the CA670 Siren and latch untill the siren quit receiving its signal/pulse or I disable from remote/unlock door/s?

Can someone help me with a relay setup that could accomplish this or suggest a better way.

Thanks

Matrix733

Replies:

Posted By: KPierson
Date Posted: September 10, 2008 at 9:21 AM

You could install a relay on the siren output - I'm not sure if CodeAlarm uses a + or - siren output.

If it is a + output then wire it like this:

Pin 85 - + siren output
Pin 86 - ground
Pin 30 - 12vdc
Pin 87 - siren and strobe output

If it is a - output then wire it like this:

Pin 85 - (-) siren output
Pin 86 - 12vdc
Pin 30 - 12vdc
Pin 87 - siren and strobe output

The only issue here is that when the siren chirps during arm and disarm the strobe will flash. You may be able to tie the (-) when armed wire in to the mix to elimite the strobe from flashing on disarm.

-------------
Kevin Pierson

Posted By: Matrix7333
Date Posted: September 11, 2008 at 8:19 AM

Thanks, will give it a go and let you know. You just gave me an idea when you mentioned the (-) when armed output, I might be able to find a similar wire when disarm as I have a 06 escalade EXT with this alarm and whenever I unlock the doors it turns all my accerories on, radio ect.

Thanks again