Sold the 07 and picked up a really nice 14 FX4 with 15k miles. When I wire in my air horn I want it to be activated by the steering wheel horn switch. I'm going to use a SPDT to move from the OEM horn to the air horn. From the wiring diagram for the 14 I believe the horn is supplied power from the horn relay when it is grounded, and the power is supplied from the BCM by a yellow/red wire. Can anyone tell my diagram is correct, or if there is an easier way to do this.
Thanks
Bob

 

It looks good to me. Assuming '14 wiring is the same as '13.

Edit: Your wiring description does match my '13.

 

You could make a simple check with a test light or volt meter at the horn themselves in front of the radiator. See if the +12 or ground toggles.

This may also be a easy access point for your wiring splices.

 

Thanks guys. I refuse to use those vampire clips to connect the wires. I solder and shrink wrap everything, so I just wanted to double check before I went cutting wires.