Horn on my 2000 ZR2 has stopped working for the steering wheel. Works for the alarm. The fuse and relay are both good. Checked contacts in steering wheel and they appeared to be fine, cleaned them just to be sure and still no luck. Used to hear a click (when the horn worked) from somewhere under the dash when the horn button was pushed, now I don't hear it. Thinking whatever made that clicking sound before might be the issue. Any help would be appreciated!