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2005 Ford F-250, Horn Switch Rests At 12V, Air Horns


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beachbum561fla 
Member - Posts: 42
Member spacespace
Joined: February 10, 2014
Location: Florida, United States
Posted: January 27, 2023 at 6:24 PM / IP Logged Link to Post Post Reply Quote beachbum561fla
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
i am an idiot 
Platinum - Posts: 13,680
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: January 27, 2023 at 7:40 PM / IP Logged Link to Post Post Reply Quote i am an idiot
That is the way it is supposed to be.
Let's Go Brandon Brown. Congratulations on your first Xfinity Series Win. LGBFJB
beachbum561fla 
Member - Posts: 42
Member spacespace
Joined: February 10, 2014
Location: Florida, United States
Posted: January 27, 2023 at 9:48 PM / IP Logged Link to Post Post Reply Quote beachbum561fla
So then I can just eliminate the switch and tap into the blue wire and that'll work?
i am an idiot 
Platinum - Posts: 13,680
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: January 28, 2023 at 9:20 PM / IP Logged Link to Post Post Reply Quote i am an idiot
Correct.
Let's Go Brandon Brown. Congratulations on your first Xfinity Series Win. LGBFJB

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