Only the driver's power windows and lock switches works. The other 3 doors' switches don't work. It is a fuse or something more complicated?

 

I had this problem on my first Cherokee(a 93). The power window lockout switch on the drivers panel turned out to be the problem. As you may know, this switch disables all window switches except the drivers. I fixed it by moving the switch back and forth several times. Apparently this must have "cleaned" the contacts inside the switch. At least that's what I came up with since most of us hardly use this switch. The bottom line is it fixed the problem without having to purchase new parts. Good luck.

 

The same thing is happening in mine and while I haven't extensively looked into it or tried to fix it I think it has something to do with the window lock switch malfunctioning.

 

I just fixed this on my Cherokee yesterday. As was already said, it was the lockout switch in the drivers door. I bypassed the switch by cutting the yellow 14 gage wire on pin 8 of the small plug and splicing that into the 14 gage tan wire on the large plug. Now the switches in all of the doors work, but the lockout switch doesn't shut off the other three doors.