I am trying to disconnect my horn from the steering wheel, and have an external button on my dash to press to power the horn. I need to know which wire under the wheel controls my horn. I've got it narrowed down to either the orange, black, or dark green wire. After I cut the wire I want to attach it to an external horn button. So which wire should I cut?

 

I think that your best bet is to get a wiring diagrahm from your local chevy dealer, that sould help out good luck.

 

try grounding out each one. i'm pretty sure its orange. when you ground it out the horn will sound.