I have a Mamba Max Pro. I was running a Trinity 10.5 sensored motor. I just purchased a new Trinity 17.5 D3.5. My stuff has sat for a while so I powered everything up and test ran it and all was fine with my old motor. I installed the new motor with old sensor wire and nothing would power up. As soon as I unplug the sensor wire everything powers up. The minute I start to connect the sensor wire all power is lost. I tried the new sensor wire that came with the new motor and no change. Anyone else have this problem or have a suggestion? Thank you.

Sounds like a bad sensor board in the motor. I would contact Trinity or your vendor where you bought it.

are you checking to make sure you have the wires correct? a to a b to b and c to c, they will be marked on both the mmp and the motor can.