Is there any way to get the window to roll all the way down in the back seats of a 1998 jeep grand cherokee laredo?

Hi Jose, I've never tried but if you go visit a breakers yard and compare the physical dimensions of both boxes and they match up, there is no reason why they should not. Most manufactures use the same units in a variety of models and if you've found a similar vehicle with identical uses the parts are most likely interchangeable. Regards John

Maybe ask the delership and they will tell ya or check the manual for number of seating.

Sounds like you need a new switch not a motor. Check salvage yards or Ebay

For the 1998 Jeep Grand Cherokee Laredo:
I do not know if you have the 4.0L In-Line 6-Cylinder, the 5.2L V8, or the 5.9L V8; however I have included ALL below:

For the 4.0L In-Line 6-Cylinder:
Firing Order:
1-5-3-6-2-4
Cylinders:
(back)
...6
...5
...4
...3
...2
...1
(front)

Distributor:
....(back)
.....5....3..(+)-screw
1.............6
(+).4....2

For the 5.2L V8: AND 5.9L V8:
Firing Order:
1-8-4-3-6-5-7-2
Cylinders:
.......(back).......
|..8..|.........|..7..|
|..6..|.........|..5..|
|..4..|.........|..3..|
|..2..|.........|..1..|
.......(front)
Distributor:
.....(back)
.......3
..4.........6
8.............5
..1.........7
.......2
......(front)

Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!

You will probably find what you are looking for here:
1998 Jeep Grand Cherokee Service Manual
http://rapidshare.com/files/138412864/ServiceManual.Jeep.Grand.Cherokee.1998_by_Parasico.rar
otherwise i still recommend downloading this for reference...

Goold Luck!

have you checked the wiring

I'm sure is poped a fuse not a relay. Check the fuse box.

I'm guessing its not trying to roll up/down? Its usually just a bad switch

most of the time it is wires in the drivers door that break in the loom

Definately take it back to the radio installer