i have a 1990 jeep cherokee with 4.0 and the belt has been sqeaking and the batery light has been on so i changed the altenator and belt. belt still squealing and batery light still on but it goes on then off then on again and somtimes the belt stops squeaking then comes back. been thinking mayb bad pully for the sqeaking and bad terminal or bad battery or bad ground?? any i deas thanks in advanced

 

Try tightening the belt a little more!

 

we did that sometimes it get louder

 

Pull the belt and turn all pully's fast by hand. If one sounds or feels a little funny then replace it. Or you can put a long screw driver on each pully with the motor running. Please use caution when doing this. You should be able to hear the bad one.

 

Belt issue and battery light issue are separate. There is a bad pulley, 2 idlers, ac waterpump or power steering, alternator you changed or the belt is loose or too big.
Did you test LOAD the battery? Were you having starting problems or JUST the idiot light? Could be a loose or dirty connection. What voltages are you getting?

 

im having a similar problem but mine is only when i first turn the a/c on it basically drains my battery until i start driving continuously

 

Check the pulley on your main crank shaft balancer. On my Jeep the pulley actually started separating from the balancer. The pulley had actually walked forward away from the motor about a quarter inch. The belt would, squeal like a scalded Jackalope until the pulley mismatch shredded it. Infortunately, I'd never seen this happen to a balancer pulley before so It took shredding two belts before I figured it out. If you look at it close. The pulley is only attached to the balancer by a rubber type stuff. Kind of a cheesey design but, my new balancer has been good for over two years now. I hope this helps you.

 

Thanks y'all i will give all of those a try the load says 13.9 so