Hookin' Up Horns

[jsimonff]

Ok guys I just got my set of horns in. Bought second hand so no instructions came with them. I kinda have an idea on how to hook them up, but I would rather see if there's a thread on here with wiring diagrams. I have a compressor/tank combo with a pressure switch on the tank. There's two wires coming from the compressor, I know one is for 12v and one is for ground,but some diagrams I look at says the red wire goes to one side of the pressure switch.

Then where does the other side of the pressure switch go to?

There is also two wires coming from the solenoid on the horns, where do those go?

From what I'm gathering this is how I think I should hook it up. LMK if I'm right or where I can find a better diagram.

[nolimit]

i just installed mine about two weeks ago. i was going to install it like in your diagram but i was told not to. if there is a leak in the hose going to the horns or coming from the tank, your compressor will be turning on all night. and if you have an alarm it will set it off.
what i did is i connected the compressor to a relay and to acc power (so it turns on when the car is on) and i connected the valve from the horns to a on off on switch (so i can switch from the regular truck horn to the train horn). let me see if i can find the diagram i used.

here is the link i used
HB4H install tutorial - Train Horn Forums

good luck!