I have a 1995 Jeep Grand Cherokee with 4.0
Im having a door lock issue, my power door locks only work on the driver side and back hatch. Both front and back on passenger side dont work, lock or unlock. Im hoping its just a relay or something

 

I fried and melted the driver's side front door lock on my old '94 ZJ Grand Cherokee when I was doing some welding to fix the driver's side front door that wasn't closing properly... got a replacement power door lock motor from the local Pick-'N'-Pull and wired it up... it never worked right after that, though it still made noise when you pressed 'Unlock' or 'Lock'... all of the other locks still worked perfectly. I'm not sure what caused it other than that I could've positioned the new door lock motor incorrectly inside of the door.