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Horn Relay?

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=2970
Printed Date: July 21, 2025 at 1:08 PM


Topic: Horn Relay?

Posted By: carguy411
Subject: Horn Relay?
Date Posted: August 21, 2002 at 12:05 PM

i am going to put an alarm/remote startin in a infinity g20. now the customer already has an airhorn replacing the factory horn. there is a relay under the hood already powering the air horn. now when i wire in the horn ouput of the alrm do i need to add a relay even though there is one undser the hood alraedy. can i just go right out aff the alarm to the horn wire.

if i need a relay can i just hook the horn output to the relay under the hood

please let me know

thanks




Replies:

Posted By: 1nicemustang
Date Posted: August 21, 2002 at 12:31 PM
to be safe id attach the wire before the horn relay. are the air horns running off that relay also?? if so the compressor might be a bit much with both going at once.

-------------
Lee



Posted By: carguy411
Date Posted: August 21, 2002 at 1:01 PM

there is a new installed realy under the hood for the air horn. so should i install another realy off the alarm or just run the horn output straite to the horn wire in the car

thanks




Posted By: sparkyssb
Date Posted: August 21, 2002 at 1:40 PM
well, if he's got the air horn to work with his standard horn switch (in the steering wheel), then just hook it up like a normal horn, straight off the horn wire. The relay is there so that after the (-) is given by the horn switch, it turns on the relay thus powering the air horn through pins 30 and 87.

just, everytime his alarm goes off , watch out!!! its gonna be loud! posted_image



Posted By: sparkyssb
Date Posted: August 21, 2002 at 1:41 PM
P.S. If your wondering where to wire it up at, make sure its before the relay, not after.


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