Starter location on 1997 e350 super duty class c?

Ford trucks usually have two solenoids. One on the starter, which if you got a new starter should be new. Second one is usually on the inside wheel well close to the battery. I would try using a fairly heavy jumper wire at the second solenoid, from the wire that goes to starter solenoid to positive battery terminal. If engine cranks then that solenoid is bad. If it does not crank, then something may be wired wrong at starter.