it could be a lot of different factors such as master cylinder is leaking past seels, crack in a brake line, leaking wheels cyclinders or calipers, air in the brake system that will cause brake pedal to go to floor if it is hard and wont move could be a failed brake booster
The grand Cherokee does have four wheel disc brakes. The wrangler and Cherokee have rear drum brakes.
you can get the whole package on ebay for under $200.....Callahan Brakes and rotors.. Just type in 2002 Jeep Grand Cherokee Laredo brakes in the search on eBay
Drums
No
There is a dead short to ground in the circuit.
On the axles, just before the hub and brakes.
There are disc brakes front and back on the Cherokee. EDIT: Cherokees (XJ) have Drum Brakes in the back. Disc in the front i don't know if you were referring to the new Grand Cherokees .. Those have All Disc. Hope it helps. (i own a 88 Cherokee XJ)
The price of the Jeep Grand Cherokee depends on the year it was made, whether it is new or used, and if it it used, the condition of it. A new 2013 Jeep Grand Cherokee costs around $26000.
transfer case
There are several things that can cause your 1993 Jeep Grand Cherokee driver information Center not to work. The most common cause is a blown fuse.
Brakes.
There can be several things that will cause your 1994 Jeep grand Cherokee to make a loud clanking noise when you drive it. The most common cause is a bad u-joint.