Originally Posted by MoyockPowerstroke
I have already used the #4 switch for the high idle mod....I guess I'd use the remaining for a Switch to shift the steering wheel horn control switch from stock to air horn relay (incidentally has anyone already done this and if so, could you share how you did it, preferably with pics), Another switch could be used to turn on/off aux reverse lights for tow hookup at night, another switch could be used to control and externally mounted air compressor used to inflate tires, air shocks, etc..
For the train horns i think you would need a 3 pos. switch
Top on would be factory horn
off would be blank
bottom on would be train horn
I dont think that you could do that with the upfitter switches unless you rewire it and im not sure if it would work then