1997 Power door lock problems

I have a 97 Safari, a couple of weeks ago the power locks started acting up. From the drivers switch it will lock the drivers door and the passenger door but will not unlock the passenger door, the sliding door will not lock or unlock any way but manually. The passenger door switch will only lock the passenger door and will not unlock any of the doors. I replaced the lock actuator in the passenger door and no improvment. I think it may be a relay but can't locate it. Any Ideas?

I have a 97 Safari, a couple of weeks ago the power locks started acting up. From the drivers switch it will lock the drivers door and the passenger door but will not unlock the passenger door, the sliding door will not lock or unlock any way but manually. The passenger door switch will only lock the passenger door and will not unlock any of the doors. I replaced the lock actuator in the passenger door and no improvment. I think it may be a relay but can't locate it. Any Ideas?
had similar problems on my 95,changed the window motor and still no go.opened up the rubber boot that holds all the wires that run from the body into the door.these wires control everything electrical with the doors.12 wires in the boot ,half of them were broken completly .repaired them now every thing works.grab the boot when you push the buttons,see if any thing starts to work,that was my means of finding the problem.