I just replaced the alternator in my cherokee and it still isn't charging what could it possibly be. Shuts off when ground is pulled any ideas

 

What year is it ?
The alternator is controlled by the Powertrain Control Module, and wiring also goes through the ignition switch, to power the module and one field terminal on the alternator. Plus. there a 30 amp fuse to power through the contacts in the auto-shut-down relay.
Lots of stuff in the control circuit, at least on a '94.

 

It is a 95. Is there any chance that something in the little box that bolts on is damaged and what is this little box called?

 

Not a good idea, subjects the electronics to all sorts of weird voltage spikes.

 

Replace all your battery cables and engine ground. Had the same problem on my 92. Replaced my cables and problem solved

 

Theres nothing to that box. Its just to id the alt connector at assembly plant.

 

There are two terminals on your PDC marked "bat" and "gen" with a large (125 amp) fuse between them. Make sure you have battery voltage on both terminals with the engine off.
You'll find a drawing here:
https://www.cherokeeforum.com/f2/pdc...elp-plz-76213/

 

Ok so this is my panel cover. which fuses I should I be testing. Its a 95 4.0 with a.c. no cruise.