RE: Escape Horn Wiring
First let me say, be very careful about tapping into wires on this vehicle as it has air bags. There is no horn ring, the horn switch sends a signal thru the clockspring to the horn relay, the relay is what energizes the horn. Not sure what you are tapping into, do you need to power the horn, or what? The wire color to the horn itself is yellow/red. The input from the switch to the horn relay is brown.
Any wire loom you find wrapped in yellow, is for the air bag system and should not be tampered with.