Classic/Antique Car Repair: 1994 chevy g20 conversion van, chevy g20, head screws

Question
my left horn button just stopped working, the right button works perfectly any help would be greatly appreciated.

Answer
It is apparent that the left button has lost it's contact or that one of the small wires just under the soft trim of the steering wheel has broken. But, is the steering wheel the Chevrolet wheel or a fancy after market unit added by the convereter? There should be a couple of philips head screws accessable from the bottom side of the steering wheel. Removing them will get the center section of the steering wheel off so that you can check it.
Brad Sears