No start, no cab power issue

[Engineman2018]

Thank you for your response Rawze. I referenced one of your previous posts regarding the unreliablility of the CECUs to my boss, emphasizing how the issue disappeared when batteries were reconnected. I am currently cutting wires to under glow lights that were installed by a previous driver to see if thats been an issue. I will run through the fuses and replace all of them as well seeing as its a cheap and quick thing to do.

Another thing I noticed, when keyed on engine off, if the blower motor was turned on high, the amp gage would read a 25±10 amp draw on system with the red indicator light illuminated.