Help no fan!!!!

I have a 2012 pete 386 home built glider. Truck was built with a custom truck witing harness. Has a 98 n14 celect plus. I just had to have motor overhauled. My fan worked normally when the truck went in. But now the fan will not work off the ac or the temp sensor. Been chasing down ever idea we can come up with. Checked all the grounds and even add 1. Don't seem to be able to find any broken wires. Put a test ecm on and it didn't work either. Kinda at a loss here.

 

I have no clue. The strange part is. When it went in the shop the green wire to the fanstat had power. Now the yellow wire has power. N no one rewired it.