I noticed that the rear hatch on my 2003 Expedition does not lock. The doors and rear windows lock and unlock, but not the rear hatch. I’m not sure how long this has not been working, but I recently was doing some work around the fuse box and made some new connections. I don’t think that I changed anything, but I had to take the ground wires loose to add another one. I’m reasonably sure that the fuse is ok. Any suggestions?