[Midwestern4x4]

I have a 99 7.3 Truck.
As of a Week ago The truck wouldn't start. I thought it was a relay till I switched it out , and it did nothing. So I jumped to next possibility , and turned key to run position , and went to starter relay . Jump the Terminals , and it starts.

So Yesterday I put new relay in , and it started right up. Then went to my buddy's and it wouldn't start with the key. This morning Key got it going... Anyone got any Ideas where else to look? It sucks to need a screwdriver to start my truck.