03 Horizon DP had a on /off rocker switch on the Dash, use a blank space. Now this is where I might get in trouble. I assume that it opened or closed a air solenoid. Then the air horn worked from the steering wheel. On , blow horn get air horn, Off, blow horn get regular horn.
After having said that ,,you are on your own.. Good Luck
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Happy Trails! ICHN2GO, Seaford VA,
06, 34 Newmar Ventana
02 Jeep Liberty
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