i have an isuzu rodeo 1998. For the past few months, the horn will get stuck for no apparent reason. it started happening on long trips (over 1 hour) but it's happened when the car isn't running too. the only way to make it stop is by removing the fuse. apparently this is common with Isuzu as a friend had the same thing happen... any ideas what's causing this...more importantly...the solution!? really appreciate some insight here. thank you.