Re: 1998 Explorer Power Door Lock Problem - Help!!
I have a '97 Explorer that I bought "used" in '99. I had a similar problem: The driver's side door lock switch would unlock but not lock the doors. I had, at first, been ready to replace the master control switch in the door (the one that controls the windows and doors) but after reading your post, I opened that "barrel" connector and pulled back the rubber boot and, sure enough, there lay the problem.
In my case it was pin #3 (3rd pin counting counter-clockwise in the outer-most ring of pins when viewing the female end of the connector, the one that goes into the body). The pink wire with the yellow trace was broken about an inch from the connector, as well as pin #1 (black with light blue trace).
I had to use a razor knife to cut the boot back far enough to make a proper repair (soldered in addition lenghts of wire and sealed them with heat-shrink tubing). That black/light blue wire was the reason the door open "courtesy" light on the bottom of the driver's door had stopped working.
Thanks for the insight! Now I just have to figure a good way to weather-proof the razor cut I made in the boot.