Can i use the upfitters switches to wire my horns

Installation Help & Advice Horn Kits
1

I just got a set of NAthan K5LA horns and I am deciding where everything needs to go on my Ford superduty . My truck has upfitter switches I was thinking of using these to fire the compressor on and off swich and use one of the switches for the hornh button its self . Has anyone else used this method ?

I wanted to wire the new horns into the stock horn but I am worried that this will intefere with the trucks alarm system that uses the stock horn

2

Hey welcome.
You can do a search on “upfitter” and get a few results. Sounds like a couple guys have done it.
Here are a couple links:
http://www.trainhornforums.com/showthread.php?t=5085&highlight=UPFITTER
http://www.trainhornforums.com/showthread.php?t=2337&highlight=UPFITTER

3

The upfitter switches will work for the compressors but some of the switches i believe have different amp ratings. So check before connecting.

Also i wouldnt put the horn on the switches. I would only use a push button or the stock horn(works really great especially when locking truck) or use a manual valve for the best soundings.

Good luck with install and post pics when complete!!!

4

Welcome. I think upfitter switches supply 12V so don’t connect a line that needs to be grounded. The switch can be used to activate a relay that will ground a line.

5

I was thinking about wiring the horn directly into the existing horn but my concern is if the alarm goes off and it draining the battery also I am not sure If I want it to go off every time I lock my door ?

6

That is why I put an on off switch in line with my airchime so that in case i want my train horns silent they will be. Also in case the cop ask for me to honk my horn(which has happened in the past).

7

You could make it automatic stock horn only with the truck off.
Wire the solenoid valve off of the stock horn either hard wired or with a selector switch - however you want.
Just put a relay inline before the solenoid. Connect a ‘key-on’ source to the coil/trigger side of the relay.

8

Never thought of using a relay then when the cops pull you over simply turn the truck off in a polite way so that he can you can talk in a quiter enviorment and the horn is not able to honk