Detroit 60 Series DDEC

It would be good to clear all faults and then see which ones return. Those after 14 are likely stored
faults.

Sensor voltage high faults often indicate wiring issues, and low voltage faults are often the sensor.

Voltage faults though will not cut RPM. You may have multiple issues

 

For me, yes. My Diesel Laptops big laptop won't connect, nor will my sons DL I pad.

Some of thr other guys may know some other options. @Bean Jr.

 

probably a bad ground from ecm to battery's but id pitch the dd2 ecm and put a dd3 or 4 ecm on it

 

there's 2 hot and 2 grounds that run back to battery box i had a international that had the ground ate up with the corrosion that did very similar to your problems

 

Not me. I'm at the mercy of someone, anyone, knowing what they're doing!

 

X2 on ecm upgrade . A lot of ddec2 ecms have internal battery issues due to age and end causing a variety of issues . Power fuses and grounds are about all you can check . PS we used to add a extra ground from battery to engine back in the day it helped some with issues plus it’s inexpensive.