Clifford backup siren install

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=7304
Printed Date: July 13, 2025 at 4:52 AM

Topic: Clifford backup siren install

Posted By: armegedon667
Subject: Clifford backup siren install
Date Posted: December 28, 2002 at 8:51 PM

I have read a previous post dealing with the wiring for Clifford backup sirens that went like this:

black = ground

red = alarm's 12v constant

yellow = trigger

white = to battery or other constant power

This was for an alarm with negative siren trigger. My alarm has a positive trigger, how do I wire the siren in this case?

Thanks.

Replies:

Posted By: 10nesne1
Date Posted: December 28, 2002 at 11:35 PM

That's easy.......... just use a relay to change from positive trigger to negative trigger.

Pin 86 and 87 to ground, pin 85 to positive trigger from the alarm system, pin 30 goes to Clifford Backup Siren (Yellow wire), and pin 87a do not use.

Posted By: armegedon667
Date Posted: December 29, 2002 at 2:59 PM

Ok, I was just wondering if the siren itself could be hooked up with either a + or - trigger without the need for a relay.

Here's another question: My horn honk output is - trigger, is it possible to hook up more than one siren to negative trigger outputs without the need for an additional relay? I was banking on having to use a relay anyway, maybe I'll just run all of the sirens with negative triggers.

Is there any advantage to running the horn honk output just for the horn and the siren output just for the sirens or is it just a redundancy issue?

Thanks.

Posted By: 10nesne1
Date Posted: December 29, 2002 at 9:51 PM

well, you can hook up a siren out to the horn, but you do required a relay. Most siren output can driven up to two sirens, but when hook up to the horn and the horn can not be on constant because it will burns out very fast. If your alarm system has an horn output than use it. There are a couple ways to hook up the factory horn with a siren output with a couple relays.