Accessory add to upfitter
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5th Wheeling
Joined: Nov 2020
Posts: 35
Likes: 1
From: La Verne, CA 91750
Accessory add to upfitter
G’day all!
I want to add a LOUD electric horn to my ‘17 F-250 SD, probably using an upfitter switch. How difficult a project is it…I want to wire it through a relay.
I want to add a LOUD electric horn to my ‘17 F-250 SD, probably using an upfitter switch. How difficult a project is it…I want to wire it through a relay.
Fleet Mechanic
Joined: Jul 2019
Posts: 1,649
Likes: 695
If you are using an upfitter switch, you don't need a relay. The upfitter switch drives a relay. Find the upfitter bundle of wires under the hood, choose the wire that corresponds to the switch you want to use and connect the horn power wire to it. Connect the ground wire to a good ground.
Lead Driver
Joined: May 2021
Posts: 5,848
Likes: 3,471
From: Uh oh, CA
I used upfitter #1 for an air horn and it's freaking awesome! I will say though that one night after a concert we jumped in the truck and I grabbed the window visor down from the windshield real fast and accidentally hit the upfitter switch... the horn just went off and it took me a moment to realize what was happening! LOL... good thing everyone coming out just came from a loud concert! I like having the horn on the upfitter though...
Cargo Master
Joined: Jan 2007
Posts: 2,243
Likes: 79
From: Roman Forest, TX
I used upfitter #1 for an air horn and it's freaking awesome! I will say though that one night after a concert we jumped in the truck and I grabbed the window visor down from the windshield real fast and accidentally hit the upfitter switch... the horn just went off and it took me a moment to realize what was happening! LOL... good thing everyone coming out just came from a loud concert! I like having the horn on the upfitter though...
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