For an 01 Civic. The Keyless entry has stopped working. The remote works, it lights up, even replaced the batteries and when I hit lock or unlock the lights flash but no horn and it doesn't lock. Anyone have any ideas?

 

Do the horn and locks work separate from the keyless remote?

Check whether fuse 7 or 16 is blown.

 

Yes.

 

The multiplex control unit located in the under-dash fuse/relay box may be faulty.