Before you get too deep in replacing parts,check my previous post on
"Electric Door locks Blow Fuses" .
The problem and fix was the manual door mechanism was binding! First; take
the door lock button "off" and then try the electric remote and the "fob".
If the lock/unlock function works ,simply replace the plastic lock button
with a longer aftermarket one. If that doesn't work you may have to pull the
door panel and check for a "binding " mechanism (I had to and it's a simple
process). Make sure you don't break the attaching plastic clips. Use an
upholstery tool "if you can get one" (they are cheap). Then troubleshoot for
binding with the panel off. May not be your problem,however, mine was
binding so bad that the unlock mechanism was placing a load on the door
locks so tightly that it caused the fuse (#18) to constantly blow!
BTW: for those that read the previous post. No one used a "slim jim" as I
suspected!  :>)
Bill