Car Horn Beeps 3 times after trying to lock with remote

This just started recently- like today; never any problem before. Tried locking the car with remote after stopping and the horn sounds 3 times and nothing happens with door locks (normal operation is hit the lock button on remote, locks operate and horn sounds once). Trunk release also does not work with remote. Inside door locks are not functioning but all other inside electric are working fine (windows, instrument panel, etc). Car does start, everything else seems to be normal. Checked manual and it states that the door locks are on a circuit breaker that should automatically reset after the problem is cleared but obviously this has not happened or isn't the problem. Before I go absolutely bananas checking for a short somewhere in the system, is there a fuse in either fuse panel (engine compartment or passenger side) that can be replaced to solve this problem? Thanks for any help you can provide on this problem. Car is really a champ and would hate to start thinking about replacing it because of a simple problem.