SOURCE: serpentine belt diagram for a 5.9 diesel with air and 9 pulleys
5.9L DIESEL
The 5.9L diesel engine accessory drive system (with a/c) consists of :
CAUTION:
When installing the accessory drive belt, the belt must be routed correctly. If not, engine may overheat due to water pump rotating in wrong direction. Refer to or for correct engine belt routing. The correct belt with correct length must be used.
1.
Position drive belt over all pulleys except water pump pulley.
2.
Attach a 1/2 inch ratchet to tensioner.
The 5.9L diesel engine accessory drive system (without a/c) consists of :
3.
Rotate ratchet and belt tensioner clockwise. Place belt over water pump pulley. Let tensioner rotate back into place. Remove ratchet. Be sure belt is properly seated on all pulleys.
SOURCE: Charging problem on 1996 Dodge Ram 3500 Cummins Turbo Diesel
I had the same problem on a 94 dodge with the cummins. It seems the crank sensor that reads from a notch on the harmonic balancer was the problem Without this sensor reading that the engine is running the alternator wont charge. Possibly the same problem with yours
SOURCE: can i get apicture diagraghm for belt replacement
the one above is for :
Accessory serpentine belt routing—2004–05 5.9L Diesel engines without A/C
The one below is for:
Accessory serpentine belt routing—2004–05 5.9L Diesel engines with A/C
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SOURCE: how to change a serpentine belt
Make sure you know how the belt goes on so you don't second guess yourself when you get the old one off. Find the tensioner pulley which is a pulley that is not running anything. Either in the pulley or on the tension arm the pulley is bolted to you will see a square hole that is the size of a 1/2" drive socket wrench. Get a 1/2" socket/breaker bar and put the square peg in the hole and then pulling the wrench one way or the other will release the tension on the belt so you can remove it. Then put the new belt on in the same way the old one came off and release the tension to get the belt over the tensioner, then release the wrench and you are good to go.
Good Luck
5,7L HEMI 
The 5.9L diesel engine accessory drive system (with a/c) consists of :
The 5.9L diesel engine accessory drive system (without a/c) consists of :85 views
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