Help w/ adding a backup siren

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=43347
Printed Date: July 12, 2025 at 10:21 AM

Topic: Help w/ adding a backup siren

Posted By: 140db
Subject: Help w/ adding a backup siren
Date Posted: November 19, 2004 at 3:10 PM

Do you guys have any idea how to hook up the siren with a car that has a alarm that pulse the positive lead? The backup siren has the follow wiring: blk- ground, red- 12 volt, WHITE/ brn strip - to negative siren, yellow- 12volt ignition.

The siren continue to go off once I connect the battery and would not function with my alarm. (Did try the key) I believe the grounded WHITE/ brn wire is causing it but have no idea how to make this work.... any help is appreciated.

Replies:

Posted By: Velocity Motors
Date Posted: November 19, 2004 at 5:23 PM

Use a relay to convert the signal: https://www.velocitymotorsport.com/images/install_notes/P2N.jpg

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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA

Posted By: 140db
Date Posted: November 19, 2004 at 8:14 PM

Thanks for the reply. I did a search right after the post and had figure out to use a relay for siren.

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