Cummins ISB Engine Crank No Start - Diagnosis & Repair Part 1 - School Bus Cranks but doesn't start 

Pro tip you can back fill the air tanks to get rid of the noise a majority of the time

I enjoy these buses from the summer.

Would it have not been easier to connect the wiring harness to the suspect ECM without removing the known good ECM and see if coms and a start could have been initiated? or were the wires not long enough?

Grasias

I've got a question about a 7.3 I've narrowed it down to either the PCM or the HPOP how do I test the HPOP

Feedback - dont make a video with an ear piercing alarm noise.