Horn wiring schematic
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More Turbo
Joined: Apr 2013
Posts: 661
Likes: 21
From: Waukesha WI
Horn wiring schematic
Ref. 75 F-150: I need a horn wire schematic. I have the harnesses to include the relay. No clue how to install it.
It replaces a jerry rigged red wire. Not long ago someone emailed me many pages of schematics. The print was
so fine I could not read it. Your assistance is appreciated.
It replaces a jerry rigged red wire. Not long ago someone emailed me many pages of schematics. The print was
so fine I could not read it. Your assistance is appreciated.
Mountain Pass
Joined: Oct 2020
Posts: 118
Likes: 6
I just went through figuring out my horn wiring but it was different because I have an American Autowire harness. Basically I have a green wire that goes from the relay to the horns. A power wire to relay. And I think the 3rd wire to the horn button to switch the ground on and off to activate the relay. The horns have to be grounded as well. The negative wire that goes from the relay to horn button goes up through the turn signal connector/harness. If I'm wrong with any of this someone can correct me but I believe this is how that 3 prong relay works.
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Loosescrews
1973 - 1979 F-100 & Larger F-Series Trucks
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Mar 27, 2022 11:42 AM
