Hi All. Lookin to add a air blow controlled by a M code to a VMC1000 with a TNC370 control. Found that M50, Alt Coolant, is the only code available that does not require a M Verify. Found that M50 drives the 21CR relay on the distribution board, but I can't find anything in the wiring diagrams that shows where the contacts for this relay are connected. I'm certain that with some time and a meter I could peck around and fiqure it out, but thought one of you BP experts might know where the connections are for this control relay. Thank You