Did you check the ground?
Good call.
I checked power to the ECU. It tested good. Then I checked ground, nothing. The wire harness is a real mess. I pulled the harness almost completely out of the chipper. The loom was melted in one spot and there are additional splices. I tracked the ECU grounds to a wire that had been hooked to the battery positive.
I started fixing the harness on one end and am installing, re-routing it and fastening it down. I'm working my way back to the other end.
The engine has an engine mounted ECU with 2 connectors. One connector is Perkins/Cat and goes to everything on the engine, engine (sensors and injectors). The other connector is OEM side, power, grounds, throttle signal, can bus...
The engine was distributor supplied to Altec as an enclosed power unit with the OEM harness and control panel.
Altec has safety interlocks and other stuff electrically controlled on the chipper. They tie into the OEM harness with that stuff. There is a noticeable difference in quality between the 3 parties, Perkins, the engine distributor and Altec.
People get frustrated working on this stuff cause they don't know who or where to get product support from.
I have hours of work ahead of me before I can try to start it but I did jumper some power to the ECU and control display so I can see how many hours are on the machine. Only 144 hours.