I just converted a 94 Probe to electric, 144V, Curtis 1231C. I was stopped at a light, when trying to go, had loss of power to the motor, then started. I got 1/2 a block away from home and it died again, this time permanently. Later, I found as the main contactor was engaged and power started flowing, the motor hardly turned and I saw electric sparks coming from the contactor going to the contactors plastic case. After shuting it down, I could see the side of the case burned. What would cause the HV to jump to the case and not flow through to the controller / motor?