Need Help Fast!

[brownf]

I recently bought a 2004 F250 King Ranch with the 6.0 Diesel. The only work I've ever done on diesel motors was mostly maintenance on big farm tractors. Since I bought the truck, I've replaced both batteries and the alternator (1 of the batts was bad and the alternator had a diode stuck open). It ran fine for about a week. This past Sunday, it wouldn't start. It turns over, but it sounds like the batteries are almost completely dead. Took out batteries and alternator and got tested at Advance. They all read good. Put them back in truck, tried to jump it off, still the same thing. It turns over every time, but just VERY weak. Could this be the starter even though it's actually turning over some, or is there something else it could be?????

[atvrider93]

could be the starter but more likely a loose battery cable or starter wire somewhere

[Newman]

I'm with ATVRIDER93

[brownf]

Yep it was the starter. Got it put in and cranks like new! I can tell now that its been bad since I bought the truck, bc it cranks like never before with this new one!!