97 Cavalier horn question

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=49296
Printed Date: July 03, 2025 at 11:23 AM

Topic: 97 Cavalier horn question

Posted By: TJ92Civic
Subject: 97 Cavalier horn question
Date Posted: February 03, 2005 at 6:41 PM

I'm installing a Crimestopper rs-900vii in a 97 cavalier. Will I need a relay for the horn? or can I just connect the wire? The book only sais to use a relay if +12v is needed. But it also sais for a LOW CURRENT horn trigger.

thanks

tim

Replies:

Posted By: mo12v
Date Posted: February 03, 2005 at 7:32 PM

U can usually hook up the Negative Out for horn to the Horn wire at the steering column. Some use Relays regardless of Negative or Positive. Your RS probably puts out 500ma or less for a Negative Output. I would suspect it will work O.K.

-------------
MO

Don't Learn from Others Mistakes
You Might Be the One That Knows.

Posted By: Velocity Motors
Date Posted: February 03, 2005 at 8:03 PM

I would use a relay. It wouldn't hurt and you know it will always work for you if you do it right the first time. It will take more time now to install a relay, but it will save you time if there's trouble in the future with the horn output.

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

Posted By: brcidd
Date Posted: February 03, 2005 at 8:27 PM

I've installed several of those units- I have never used a relay for the horn-- If you think about it- that negative that the horn uses drives its own relay- since most all horns are grounded as mounted and are powered by the +12 volts through the horn relay provided by the vehicle..... If you are still in doubt- then cut the horn wire and run it through your DVM and measure the amp draw- should clear things up real fast.....

-------------
Brcidd - Engineer That Does Remote Starter Installs on the side.

Posted By: TJ92Civic
Date Posted: February 03, 2005 at 10:19 PM

OK thanks! Has anybody hooked up a horn on a Cavalier without one? I have done a few dodge rams, and a ford ranger without one. But I put one on my Civic lol. I didn't want to fry the brain of the Compustar, little too expensive of a mistake. I'm probably going to be installing this sometime next week, so I still have time to decide lol..

tim

Posted By: TJ92Civic
Date Posted: February 05, 2005 at 7:20 PM

Will it usually say on the printouts if you need a relay? I noticed it says to use one on a 89 accord. I used to have one. But it doesn't say about the Cavalier.

thanks

tim