hey guys, newbie from NC here and this is my first post.

my brother has a 1996 cherokee country 4wd V6.

i'm pretty knowledgeable when it comes to auto's (american) but i havent worked on too many jeeps. i have an 88 bronco 2 and currently drive a ford explorer. dont hate me.

he's had ALOT of issues with this hunk of metal this year. since june he's had these repairs:

-new head gasket
-new master cylinder and brake pads
-tune up (distributor cap, plugs/wires, PVC valve, etc)
-new battery

about 3 weeks ago we replaced the battery after it started having some cranking issues. his old battery was bad and the new one corrected the problem.

so today he goes to crank it to go to work and it wont crank. you can jump it and it will crank, but the idle is pretty rough and eventually it will die.

i'm thinkin its the alternator as the battery aint gettin a charged and i'm guessing it is keeping it from running. it cant be the battery if it can be jumped, right?

sorry for the long post, any ideas would be great and much appreciated, it's his DD and he needs it back on the road as he cant afford a new car right now. thanks in advance......