My 2000 Grand Cherokee has electrical probs, the passenger side electric windows have stopped workind and the dome light will not go out, but if I remove fuse No. 12 and leave it out for 30 min then replace it all the problems disappear for about 10 min then the same prob's start. Do you think its the Body Contoler ECU and if so where is it on the car, and can I get a replacement part and refit it or do I need to get it re-programed by a dealer, the problem is I am in the UK and my Jeep is in Spain so I need an answer before I next go over.

SOURCE: electrical issues with a 1994

sounds like pickup coil issue found inside distributure sorry for spelling

SOURCE: 2000 jeep grand cherokee 4.0 liter engine timing belt replacement

If you have the same pulley arrangement that most 4.0 engines have that pulley is an idler not a tensioner. Your power steering pump has a pivot bolt, and a slide under the pump. You adjust belt tension using the pump.

SOURCE: All Windows stopped working on Jeep Grand Cherokee

I had the same problem with my windows all of a sudden stop working. With a little searching and a 4 dollar part I fixed the problem myself in less than 5 minutes This one worked for me!
Click on the link below for the diagram and quick fix.
http://www.wjjeeps.com/misc/power_dist_ctr_02.jpg

SOURCE: 1996 Jeep Cherokee electrical schematics and 1998 jeep cherokee

I need the bulb for the roof light for the 1996 Cherokee

SOURCE: 2004 JEEP GRAND CHEROKEE ELECTRICAL PROBLEM

take the black boot off that is on the drivers side door and check to make sure all your wires are connected and working properly, one of ours was messed up causing us to have the same problem!