2005 Ford F-250, Horn Switch Rests At 12V, Air Horns
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=147585
Printed Date: April 24, 2024 at 1:55 AM
Topic: 2005 Ford F-250, Horn Switch Rests At 12V, Air Horns
Posted By: beachbum561fla
Subject: 2005 Ford F-250, Horn Switch Rests At 12V, Air Horns
Date Posted: January 27, 2023 at 6:24 PM
i have a 2005 f250 i am trying to hook up airhorns and use the factory horn switch to trigger the relay powering the small compressors. the factory horn wire is dark blue and showing as (-) but it has 12volt when resting. when i hit the horn and have my multimeter hooked to the blue wire, it then drops to zero volts.
Is this a correct negative trigger?
i have a spdt relay wired currently to converte negative input to positive output by using a momentary switch inside the cab, which is connected to ground but i'd rather use the factory horn on the steering wheel itself.
thanks in advance for any help. it's been a little while since i've done an install LOL
Replies:
Posted By: i am an idiot
Date Posted: January 27, 2023 at 7:40 PM
That is the way it is supposed to be.
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Let's Go Brandon Brown. Congratulations on your first Xfinity Series Win. LGBFJB
Posted By: beachbum561fla
Date Posted: January 27, 2023 at 9:48 PM
So then I can just eliminate the switch and tap into the blue wire and that'll work?
Posted By: i am an idiot
Date Posted: January 28, 2023 at 9:20 PM
Correct.
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Let's Go Brandon Brown. Congratulations on your first Xfinity Series Win. LGBFJB
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