John, You need to go look at a Williams reverse unit, and reread his post. 
Your not comprehending what happened. HE did not just reverse leads to get it to work. He had it plugged into the wrong port on the reverse board. There are 2 2pin ports. One is AC power for sound board, but he left the original Williams sound board plugged in. That other port is not a AC pickup it is some sort of slave connection. Hence why his ERR sound board was not working right. It was not on AC track power, it was on the wrong port. G
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