1998 Buick Riviera

Electrical problem
1998 Buick Riviera 6 cyl Front Wheel Drive Automatic 207, 60 miles

My horn started making this dull thumping sound when I pressed the steering wheel, or when the lock button or emergency buttons were pressed on the keychain module. Every once in a while when I pressed the wheel, it would work once, then go to thump when pressed again. Fuse looked ok, and I was told the module should be ok since the horn was at least " thumping". I replaced the horn with a used one. When I pressed the wheel it worked ok. Then I pressed the lock button and it sounded, but was delayed. I then pressed the emergency button and it honked 2 times, then went into " thump" mode! If it's an electrican problem I hope I didn't fry the horn just installed. Could the module cause this or is it something else? Help
August 19, 2009.

Check out the related content below while we wait for the question to be answered by a professional mechanic.