Using car horn with alarm system
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=139029
Printed Date: May 02, 2024 at 3:01 AM
Topic: Using car horn with alarm system
Posted By: swishs2k10
Subject: Using car horn with alarm system
Date Posted: May 28, 2015 at 7:44 PM
Can some walk me through connecting a relay to my car alarm system so I can use my car horn instead of siren.
Replies:
Posted By: swishs2k10
Date Posted: May 28, 2015 at 7:44 PM
Ford Expedition
2003
Posted By: davep.
Date Posted: May 28, 2015 at 8:37 PM
You didn't say which alarm, but if it's a DEI, most of them can be programed for "horn honk" on the siren wire. There's a 6 or 8 pin connector at the base of the steering column. Dk blue wire pin 6 (-) trigger is horn. Test, to be sure. DEI sends a (-) pulse, and the dk blu accepts it. No relay required.
Posted By: swishs2k10
Date Posted: May 28, 2015 at 9:37 PM
I'm using a viper 5000 car alarm system. That's been installed for a while now. I know the location of the blue wire and I tested it today with a tester. So are you saying I don't need this relay?
Posted By: davep.
Date Posted: May 28, 2015 at 9:50 PM
Yes, you WILL need a relay for the 5000. It only has the brown (+) siren output. Program 3-1 to "horn honk".
wire the relay as follows:
30 = Ground
87 = Horn blue wire @ steering column.
85 = Ground
86 = Brown siren/horn honk output from 5000.
Posted By: swishs2k10
Date Posted: May 29, 2015 at 11:24 AM
Thank you very much. I was able to wire my relay up and the car horn works perfect.
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