I just noticed thet you have a 96. I only have an owners manual for 99 and up.
Look in your owners manual and try to find the fuse location for the door lock actuators. The fuse is for them and a couple of other things that I can't remember at the moment.
There is definitely a fuse for them though.
In that case, I would take a door panel off and verify that there is voltage going to the door lock switches.
A probe type 12 volt electrical tester works excellent for tracing where the electricity stops or to verify that it is indeed going to a failed part.