The battery cable was disconnected at the battery post. The Even Brake unit has two wires, one a positive that is connected to a power socket that is wired direct to the RV and the second is plugged into the receiver on the dash that is also wired into the power from the RV hook up. When the Even Brake negative (ground) lead is connected to the chassis ground, the Even Brake is not powered...however when the negative lead is attached to the negative post on the battery, the Even Brake powers up...as well as the cars computer, and systems. My question is: Does the Tranny pump also come on when that happens? If it doesn't then the problem is solved. If it does then what's the solution?