If you don't have a diagram somewhere under the hood, it seems that diagrams can be hard to come by. If the belt is still on the car, make a quick sketch of it's routing.
You might want to check the "answered" questions involving belts. It's a very common topic around here.
FriPilot
where can i get a diagram for a serpentine tensioner belt for a 1998 Oldsmobile bravada
diagram of serpentine belt for 528i BMW
I found this information with a diagram of the serpentine belt. Hope it helps.
Serpentine Belt Diagram ML320
This diagram is under the hood. Look for it
I need a routing diagram for the serpentine belt on a 1998 Jeep Wranger, 4 cylinder, with air conditioning
need picture of belt for 99 Sunfire Ah yes, the infamous serpentine belt! It's among the most asked about items in the Sunfire group. My car still has a diagram for belt routing on the underside of the hood. Yours might too. If not, and the belt is still on the car, make a quick diagram of your own for reference. If your belt has left the car and has joined the bits of semi truck tires on the highway and you can't find a diagram, you're not screwed, but it sucks. Most any GM dealer ship should be able to come up with a diagram for you.
google this. ford-autobestanswer. you will find the diagram picture.
How do you replace the serpentine belt in 1997 sunfire
Diagram is on the engine by the belt. You may have to clean off oily residue to see it...
www.teamzx2.com
Most cars have the diagram on a sticker some where in the engine bay if not go to your local parts store they can print off the belt diagram. If you have a new belt some have the diagram on the back of the packaging.