Hello! I just purchased a 2004 H2 with a set of air horns installed under the rear end. There is a switch for the compressor and a momentary switch mounted to the left of the gauges. However, the previous owner seems to have disabled the horn button on the steering wheel. I am trying to determine where he did this. The fuse and the relay are good. Original horns are still installed with the wiring attached. Under the steering column there are a bunch of wires in a harness, near the lower fuse panel, and some have been tapped for other accessories. Can anyone help me identify which wire in that bundle is for the horn? Maybe I can test it there to see if the horn wire has just been disconnected in the steering wheel before pulling that all apart... don't really want to mess with the air bag if I can avoid it.

Any help would be appreciated! Thanks!

 

Fish On,
Your trucks prior owner probably installed the air horns bec the stock steering wheel horn switch went bad. With regards to the horn wire from the SW horn switch, it is the black wire in the BCM