I did all the above and if I take a jumper cable and go straight to the starter it will work. . But if I go thru the solenoid I have 12 volts on the main lug until the solenoid energizes.Check all battery cables and connections.-----Load test your battery even if new.----And if starter is original it would be a good idea to pull it apart to inspect brushes.---Little bit of grease for bushings.----Easy job.