We finally are to the point of putting wires onto the truck for Sermis. This is my 5th or 6th M series truck to pretty much do all the wires on. Besides the lighting diagram here on the Zone. I have found this listing of what number wire does what to be something I have to have when doing this:

https://olive-drab.com/od_mseries_circuits.php

I know I have posted this before, but figured it was worth putting out there again.