A simple way to check the horn is to jump the horn out just run a piece of wire from + side of battery and touch the spade connector on the horn as long as the horn is attached to the body it`s grounded. If it beeps obviously it`s good next thing I would check is the horn relay. Rockauto sells the low note horn for around $25,but I would check the parts for sale section here and at other forums first probably get it cheaper. Moparts is a good place to look.