04 f350 radio memory
 

Anyone know where the radio gets memory supply from or what fuse,,,,mine looses memory for week or two then come back.

Check the owners manual for radio fuses. If you don't have an owners manual you can download one here:
http://www.fleet.ford.com/partsandse...owner-manuals/
But since it is an intermittent issue I wouldn't think it is a fuse as they do not "UNblow".

once a fuse pops it pops, (the tiny metal contact bridge melts) and opens, your having another type of intermittant electrical issue, most likely wireing, IIRC the memory is the orange wire (keep alive) but I would check a wireing diagram first to be safe!

Fuse F11 under the dash supplies keep-alive power to the radio for the station memory.