Just pull the fuses and see what the draw is. The fuses will blow if the draw exceeds their capacity. But, I believe you have something else...
We have always had 2 power supply wires to DDEC. One for each bank of injectors. There will always be a very small draw (mili-amp) but if this is...
No Detroit Diesel engines have closed crank case systems to this date including 2013 vehicles.
