How often do Sensor harneses go bad?

[DrDiff952]

I just bought a brand new Mamba Max Pro and put it in my O.P.A.T. Wraith. I pulled the used MMP and put it in my Weekend Warrior 1.9 Wraith. I set the old MMP to brushed and it is happy.

I left the brushless motor and sensor harness in the O.P.A.T. and simply plugged the new MMP in.

Now when the sensor harness is plugged in to the new MMP, it has problems with reverse. But when I remove the harness, the motor works fine. The motor and harness combo worked fine with the old MMP.

[robertjpjr]

sounds like the sensor wire is plugged in incorrectly /debris in the plug / or you have the MMP incorrectly configured.
Reprogram throttle end points. Set transmitter to REV and reprogram. Try the MMP on "Auto" whatever its called. If that doesnt work try sensored only.