good thing i checked under under the hood. Cheap part, $27 from ford, I wonder how much to instal?

Serpentine belt, covered two days ago.

http://www.lincolnvscadillac.com/showthread.php?t=40383

Cost = free to do it yourself. It's a piece of cake.

where is the step by step and tools needed. I'll try it. thanks for the help, it's an '02 v6?

I don't know about piece of cake... as I recall it was a bit difficult to get routed; kind of cramped (could just be my gorilla hands and banana fingers). Do yourself a favor and pick up a goodyear gatorback. It'll run you about $40, but it's better quality, will last longer, runs quieter and is less likely to slip.