i want to get a train horn for my f250 but i dont know where i could install it any ideas? And also what can i do to keep the horn from getting mud and water in it?
Yeah the engine compartment is pretty much not an option as I found when I went to put my train horn on my Excursion PSD. The train horns are actually fairly weather resistant as long as you mount them with a downward angle toward the open end so water can run out. I'm thinking your best bet would be under the bed facing forward angled down. That's how I've got it on my excursion. The reason I say under the bed is because under the cab there is not a whole lot of room with the transmission and transfer case and all that.
Then you've got to think about where to mount your air compressor and air tank. The compressor does need to be out of the weather, water and mud, and the airline going to the horns from the tank should be short as possible. Unless you allready have some sort of good air supply on your truck. But an excellent compressor would be a Viar 100% duty cycle and a 150psi pressure switch available from Hornblasters.com along with a good selection of horns. Their HB4 is actually one of the best I've heard even though it is plastic. That's the one I've got on my logging truck and it is totally awesome!!
And with an electric air valve like most of the cheaper train horns come with, you have the ability to very easily connect the train horn to your stock horn button, or car alarm, or custom push button or whatever electronic means of activation you choose. I used to have mine hooked up to a radio controlled relay box so I could honk my train horns from 50 miles away if I so desired. he he.
I'm thinking I would mount the compressor behind the rear seat or in the bed if you've got a camper shell, and mount the air tank under the bed next to the horns. Should have a nice cross member under there to mount the horns too. Either right up close behind the cab on either side of the driveline, or on my excursion right over the rear axle there was a nice spot to mount them.
Good luck with it! They are fun!