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Found this when needed a printable copy of the serpentine belt routing on my 5.4--thought I'd share it here in case it could be helpful to others: Serpentine Belt Routing
I found this coz I needed something to take under my van with me, no short term memory. Since finally committing the routing to memory--for now---I've added the printed copy to a folder I keep inside my van. Of course I always carry a spare belt and the tensioner tools are so easily stowed they're tucked away in a tool box. I'd had to be stranded roadside or anywhere just because that belt breaks unexpectedly.
Anyway hope it is helpful--covers a lot of different vehicles too.