BigBoy relay circuit board Intellitec part #73-00824-000
Problem: My big boy relay is operational and charges both house and engine batteries, but does not disconnect when the voltage on both house and engine fall below 12.6 volts. The 12.6 came form Monaco. This means that my engine and house batteries will both discharge at the same rate all the way to zero volts. I believe that the circuit board 73-00-824-000 made by intellitec is probably bad.
I have checked my BB relay and it working fine. It engages and disengages when when you take away one of the two small wires that energize the BB relay. I checked the battery boost switch with my volt/ohm meeter and it working fine. All three power inputs, alternator/genset/Shore power, charge both House and Engine. My talk with Monaco left me a little confused when trying to order the new part. The tech people gave me Intellitec part number 73-00824-000. When I talked with Monaco's parts people they were not quite sure of the part number and said there had been some modifications to the 73-00824-000 circuit board and I would have to order an additional part to make it work due to these changes. But they did not know what the changes are.
Does anyone have any background on this or know what these changes are, and did Intellitec change the part number. Don't know what to order at this time. Can someone give me some background information and input. A source for the right part # if this number is incorrect would be very much appreciated as well.