95 dodge caravan 3.3 serpentine routing diagram

Start at front and going down from ac compressor... around and over water pump pulley...under crank pulley...up and over tensioner pulley... up near alternator but not over just yet... then under idler pulley.
with a 15 MM long handle ofset wrench attach to the center bolt on the tensioner pulley and turn CW this will pull tensioner down. as this happens you have the slack to pull belt over the alternator. now gently release tension till the belt is snug. I have done this enough times to find this to be the best and easiest way to work in this tight space. Hope this helps.