Chuck,

If you can't get it to run by jumping it to ground at the receiver/dryer, you have a bad fan, a bad fan relay or a bad fuse or an open wire. Since you did get it to run at one point, you can rule out the wiring.

Replace the fuse, just don't check it, replace it. You heard me say replace it, right? OK. If it runs, you had a bad fuse. Its common.

Bypass the relay. The relay is on the left front fender. If it runs bypassed, you have a bad relay.

If you have power to the fan, try manually spinning the fan. If you get the fan to turn by manually spinning it you have bad fan motor brushes.

What did you do to get the fan to run "at the motor"?????

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84 300DT Puke Yellow. Totalled after 438,000
84 300DT Orient Red. 169,000 (actual mileage may vary)
2002 Explorer EB (wife's)