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Hi Ken my name is Robert...
I am hoping this will help, click HERE and see page 205 and 206, it will show the sensors at the tank and show you how to calibrate them. I do not have an actual wiring diagram IF I did I would give it to you. Pretty sure this is a system that Monaco made and information is lacking. Also not sure you know this or not but Allied purchased Monaco and they do have a technical support line that takes calls during the week, I have received positive comments from other owners that have called in so I might contact them to see if they have any detailed prints for this year, they can be reached at 877.....466....6226..... Hope this helps some, my goal is for you to be satisfied with my efforts, I only get credit when you select a rating if you would like to try another expert please let me know.... Robert
Sorry I could not help out more, I will request a refund for you... Robert