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Hi, I am Mike, welcome. I'm reviewing your question.
Remove the fuse and stick in an ammeter into that fuse's socket and find out why it keeps blowing the fuse. Start by disconnecting each item on that fuse's circuit until the ammeter falls safely under what that fuse is rated at then replace the part or repair the branch circuit and the shorted wire.
If you want a wiring diagram showing everything on that circuit I will need to know if this is an E150 or an F150, which engine came in it, if it's a 4wd, rwd, and which transmission, manual or auto.
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