1996 Jeep grand Cherokee driver's door lock not operating from remote and all door windows inoperative?
I believe that a diagnostic check on your vehicle will indicate
that the security module (black box) is failing in some way. I
experienced the same with my 95 and as it got quickly worse the car
would die unexpectedly as well. Since I live in a small town and
feel very safe I rarely lock the Jeep and so have no real need for
the security features. I unplugged the module and the problem was
immediately and completely solved. On my 95 the module was under
the dash and is about 3 inches square and black plastic and clearly
marked with the name "security module". It simply unplugs. Unlike
other modules that plug in here and there in these vehicles,
nothing else is affected by unplugging it and no dash lights light
up as a result. It would be free to get a flashlight to see under
the dash and try it as all you have to do is plug it back in if
that doesnt solve the problem.
The dealer can read your system for a nominal fee and point you in
the correct direction also.
I know you can purchase replacement boxes but they are expensive
and I'm also sure that you could find one of them at a junkyard for
far less cash. I wouldve pursued this myself but my dog ate the
clicker and its $90.00 just to get a new one.
Good luck to you !!!