Rawze.com: Rawze's ISX Technical Discussion and more

I had the same issue once, turned out to be loose connection on power distribution block.

when i was trying to install a reman ecu from cummins last week the low coolant red stop engine light and all other buzzers went off before the truck wouldnt even restart again.

turned out was a bad power on pin as they couldnt get their system to connect and i couldnt get mine. i had been watching in CT before it shutdown for good as the battery voltage was fluctuating up and down even though volt meter was sitting steady at 14 volts.