I think it is a pmt issue. The capacitor charge. Change rec #2 & 5 recently. What I realized though if I manually engage the contactors you can get the truck to move in either direction. You know there are fwd and reverse contactors that work with RB and Fw. When you put the truck in either direction only one of those contactor close. So the fwd close but not RB or the Reverse close but not FW.