Often, one of the two horns will die leaving you with a single note that sounds downright pathetic. A new generic replacement set can be had in most autoparts stores in the $12-$18 range.
FWIW, since you're in the 'rust belt' expect some resistance removing the horns and bracket. I would recommend using a wire brush to clean the rust off the bracket at all of the fastener points (down to clean metal) when re-installing to ensure good ground contact.
<small>[ February 27, 2003, 10:28 PM: Message edited by: SHOooo ]</small>