1999 Ford F-53 V10 will not start after sitting for a year

Is this the solenoid you checked??


https://s.yimg.com/fz/api/res/1.2/.WebEknLch08qacFJHY1vA--/YXBwaWQ9c3JjaGRkO2g9NDUwO3E9OTU7dz02MDA-/http://www.lamustang.com/SQLCart/Images/Large/102889.jpg


Even if you checked this and got voltage on the side going to the starter, it may not be passing enough current to activate the starter. Take a jumper cable (one) and jump the two large terminals. If the engine cranks, you've found your problem.