Car door will not open back passager side 1995 jeep cherokee electric door lock will not lock doors

Bad connection on passenger side.

first is diagnosis.
you examine and test it. to see if its electrical or mech. failure.
and once discovered that follow that to logical conclusions.

immoblizer are fun, no
fix it or defeat it.
you always have 2 choices.

3rd choice, get the FSM and read it.

Pull your horn fuse for the time being. The answer is replacing the PCM with one that didn't have security installed. Disconnect the battery when pulling the PCM! It should be located just behind you coolant reservoir tank on the firewall. Do not buy a PCM from Auto Zone.

To unlock the child lock, simply open the rear doors and look on the side of door for a small switch. Simply flip the switch and the child lock should unlock.

Use the key to lock and unlock the back hatch that is how you can reset them if that don't work try the passager side door using the key to lock and unlock the door. Must use the Key or it will not work

You co0uld change the module but I don't know the exact location of yours (under the dash) If I was working on it and couldn't get a location, Id take a look at one from a parts house so I had an idea what I was looking for, then start looking. They aren't cheap though so sometimes it's best to have a good shop look it over just to make sure it will fix the problem.
When working, I test everything either with meters, scanners etc or use known good units to check problems. Here, I can only make educated guesses. Electrical parts are generally non-returnable so mistakes can be costly.
Good luck though.

try the passenger door again.

if you open the drivers door and look for the rubber boot near the hinge, pull the boot back and you will find a heavy blown wire with (i think with a red trace) will be broken. join the wire together and solder so it cant pull apart..

You can't lock the car when any of the doors are open EXCEPT with the door "Lock" button on the driver's side door. The remote will not lock the car when any of the doors are open.