Hello guys

I own a 1998 Grandjeep Cherokee ZJ
And currently having issues with my battery gauge when driving.
it seems to be very erratic when I drive which causes the Rev count to go up and down to the point of almost cutting out.
I have changed the Throttle Position Sensor along with the Fan belt but this has not really had any affect 🙃
can anyone out there help me out on what this might be ?

 

Not a expert, but I would clean grounds on the battery, cables, engine and frame. As is said don't look at them, actually take them apart and clean them!
While you are at it, I would check the alternator out put to make sure it is correct, as well.