Tank Level Controller Location

[depchief]

The tank level lights and the chassis battery readout have stopped working. Coach battery read out works. Removed the panel in search of a reset and did not find one. I now need to find the system controller. Anybody have a clue where I might find it. All fuses and pop out circuit breakers, that I found, seem to be good.
Please see below for my signature coach.
Thanks for replies.

 

[cbeierl]

Here are the full wiring diagrams for your coach: 2002 Ultimate Advantage 40J