2004 ENVOY HORN ONLY WORK IF YOU PRESS LOWER RIGHT OF HORN PAD, WILL NOT WORK IF YOU PRESS UPPER, CENTER, LEFT LOWER OR LOWER POSITIONS. I KNOW THERE IS PROBALLY CONTACTS UNDER THE HORN PAD BUT HOW TO GO ABOUT TESTING THEM?EDID NOT WANT TO PRY ANYTHING CUZ OF THR AIR BAG UNDER THERE. ANY HELP?
THANKS MIKE

Take the pad off and you'll see it.

DOES IT JUST LIFT OFF (SNAP-OFF)

Disconnect the air bag if you are worried about the airbag deploying. Disconnect the battery first. Reconnect the air bag and then the battery when you're done.

Boilerplate: All advice is advice, use at your own risk. Results may vary, Yada yada.