i have a factory alarm system with 2 remotes, for some reason just yesterday the remotes ceased to work, well the remotes seem to still be working, when i press the lock/unlock button the red light flashes on the remote. the batteries shouldnt be flat as one was replaced not 4 months ago. any ideas? could it be the receiver not working? could a fuse be blown? i dont know... any help would be much appreciated as its rainy weather here at the moment and i get more wet when i have to use my key 