Electrical problems

[DVT873]

I 2nd Waterloo. The starter has a solenoid on top of it. It is used as a junction point. Take the nut off. Be careful, cleaning what threads you can see with a brush will help. There will be several wires besides the battery cable. They may look fine but the terminal ends can be bad. Taking them off and looking is the only way to know for sure. One of those wires will be a cab power feed. From there to the ignition switch. Problems there same as turning off the key. Interesting code. On NAV ECM's loose of the ignition power just shuts it off and leaves no codes. Maybe Cummins gets switched power on more than one input. Engine harness can be an issue. Guy I know went thru that. I'll see if he remembers detail. Moonshine degrades his memory. Post your VIN. Might be able to link you to a wiring diagram.