Took car out of storage and when I turned key to on position the right fan started and stayed running while the car was on...Turned off the key and fan stopped.... What is the cause of this? And how do I fix it..

 

Most likely fan switch is jammed on. It's located in the passenger side head. Test by checking for ground on pin on cold engine, if yes, replace the switch.

 

Mine does the same thing. Turn the key to the on position without starting the car and the right fan comes on. Mine makes a heck of squealing type noise. I was thinking the fan motor might be no good? Should the fan not come on in with the key in the aux position?

 

I'd try unplugging the fan pressure switch on the refrigerant line as well (do separately to pinpoint).

Iirc, 88+ should run both fans if the fan switch (pass. head) kicks to ground (fan switch is tied to a/c fan request switch).