A couple of questions for those of you that have air horns installed on your tow rig.
First, where did you mount everything at especially the trumpets to keep them dry?
Also, do you have a separate actuator for the horn or do you just use your regular "horn"? Last one, if so, do you have a cut off switch or do you always have it active?
2011 F-350 DRW, so very similar truck.
Horns - mine is an al-a-carte assembly built over some time.
Thanks to one of our members here I started with a 26" Mack truck trumpet. To that I added a dual trumpet (recovered from a sunken boat) and a 26" trumpet from a Volvo HDT.
The Mack and dual trumpet are mounted behind the bumper, aimed down slightly for drainage. The Volvo horn is mounted under the passenger door.
I have two air tanks. A 3 gallon tank mounted to the frame under the rear passenger door and a 5 gallon tank mounted under the bed and above the driveshaft.
My compressor is mounted to a bracket on the side of the right side spring hanger.
I have a home made manifold mounted in the bed under the right side rail.
I use a 3/8" heavy duty solenoid to power the horns.
The front 3 horns are supplied by a 3/8 line as is the side mounted horn. The solenoid feed is split to the two sets of horns
The horns are wired into the steering wheel switch. But, that wire is through an on/off switch mounted on the dash.
The compressor is supplied 12 volts from the battery with 8 gauge wire to a heavy duty, water resistant marine grade solenoid (similar to the traditional Ford starter solenoids).
A kit would be easier if you want simple.
I have no problems so far with my under bed mounted compressor, but the next truck will most likely have the compressor mounted in the bed.
For the most part, I only have the cutoff switch active when towing.
I am still looking for a decent set of mid 60's Cadillac horns to replace the wimpy stock Ford horns.