After returning from a 500 mile trip I noticed that my horn doesn't honk when I use the key fob to lock the doors. The doors still lock and the lights flash, though. The horn also works when I tap the steering wheel. Does this sound like a problem with a computer, wire or something else? I thought there was a way to program the truck so that it doesn't honk when the fob is used, so I thought about trying to reprogram it but I don't know how. Any suggestions? As problems go, this is about as minor as it gets, but it's still an indication of a vehicle that is getting long in the tooth.