2001 Ford F-150 New Starter, New Battery Cables and Still No

I had to bag my starter the other day to get my truck started and left the truck running for about 12 hours straight as I was on a bit of a road trip. I returned home, shut the truck down and the next day when I had to leave, it would not start, all I got was a clunck from the starter I wrapped on it a few times and nothing. I bought a life time starter from NAPA and got the same result, so I bought new cables and same result. *NOTE* When I turn the key on (with a vehicle connected with jumper cables) the voltage gauge go to the H then to the L and climbs back up to about 5/8 and maintains that reading and all I get from the truck is a quick grunt and then nothing. I have tried crossing the celanoid and the relay both ending with the same result.