Sepentine-replace tensioner,v-belt, adjust accessory and tighten.
there is a belt tensioner pulley that maybe is not working correctly
You can do that by replacing the tensioner
the belt is automatically tensioned by a spring loaded tensioner.
The belt has an automatic spring tensioner and can not be "tightened".
look in the instruction booklet
this question should be under dodge automobiles
Its a lap belt.
Tighten it or replace it.
The alternator will move in and out to tighten the belt and the PS pump will do the same
Should be done automatically by the belt tensioner unless tensioner is weak or bad