Two weeks ago my 99' F250 V10 would not start. I tested the battery and it was completely dead. After replacing it, the truck started up right away. One week later, it would not start again. I realized that the starter was frozen up so I banged it with a hammer which unfroze it and it started and ran fine again. However, it is not starting yet again only this time it is not even getting any power to the starter at all. Any ideas??? The battery is new, the starter is fine. I do not know what to try next. Maybe the alternator? The lights and stereo work fine so i'm not sure.

Thank you

 

starter solenoid.,,, on the fender or on the starter, not sure which spot....

 

I actually just got it started! The negative battery terminal was corroded. Thank you for the reply.