ISX will not start.

[Roysbigtoys]

I put new fuses in the battery box ( 2- 15amp fuses ) and the one inline 10amp fuse by the ecm ( all the fuses I removed looked good). Per Rawze's suggestion I checked out the wiring harnesses below the starter.......the harnesses all looked ok....no worn insulation. Turned the key on and transfer pump started pumping....it took a little bit to prime the system and start the truck. I throttled up while moving the truck around the shop and the engine lost power, engine did not die but throttle was unresponsive. Engine light came on....checked for codes and J1939 came up and then went away. I have not found a good answer to what is a J1939.

I do not think I have found my problem.:anger: