99 international 3400 t444e NO WAIT TO START LIGHT.

[8Linermemphis]

Fuse size is a 25 pretty sure in battery box

 

[8Linermemphis]

Thought about getting my buddy power probe and put power to power wire to Econ and back probe the ground and see if it works then

 

[BamaBus]

Code 111 is what you want to see and it tells you that the ecm has power.

Is the bus cranking and not starting or is it not cranking?

 

[BamaBus]

This thread post #54, https://www.skoolie.net/forums/f49/i-really-need-some-help-with-the-wiring-here-14909-3.html, has some electrical diagrams I hadn't seen before. It doesn't reference a 3400 but could give some insight. Other thread post are helpful as well.

It really seems that you have lost power at some junction causing the loss of the wts light and no dash checking at key-on. It was just engine dying then it could be oil level low or high messing with the injection system.

EGES-125 (even though it's for the 3-box!) could give some direction with a single box ecm. https://www.skoolie.net/forums/f13/t444e-wiring-problem-38990.html#:~:text=https%3A/www.google.com/url%3Fsa%3Dt%26rct%3D...NXFx%2DaO0oAZThU Post #2