Uggh. Im hot (its still almost a hundred degrees outside here, and I have no a/c either), tired and now I get to deal with this.
Fordman, You need some basic tools. You need a volt meter to test current draw, voltage drop, and ohm out your glow plugs. All of us are posting and telling you what to do next and we get posts like "NO one is for starting and one is for accesories". dont argue. Read, understand, ask questions if you dont understand and perform the steps we are instructing you to.
The worlds best teacher is useless on a pupil unwilling or unable to learn.
get two good batteries (have the one you have tested and buy a used one that they can load test there, they will charge them both up for free if you leave them there for a few hours.
I am not sure if your starter cable was bad from neglect, previous owner or you cranking on the trucks with enough amps to melt the internals of the starter but not enough to turn the engine. A starter that wont turn is a dead short, meaning a 750 cca battery is pushing 750+ amps down a wire and its returning through the ground side. the load in that circuit is the biggest amp draw, a bad connection could have been that and it heated it like a light bulb and it blew.
This is exactly why we tell you what to check IN THE ORDER WE TELL YOU, and ask so many questions first. We have all been there and seen a million and one things cause a no start, we are trying to narrow that number down a bit.
get a volt meter, get good batteries, let us know when you got this.
punk