A MINIMUM OF 10 VOLTS IS PRESENT BETWEEN TERMINAL #1 OF THE MASTER RELAY AND THE RELAY GROUND TERMINALS, #4 (MASTER RELAY) AND #8 (PUMP RELAY). THERE IS A GROUND FOR THE MASTER AND PUMP RELAY COILS.

IMPORTANT:
PUMP RUN SWITCH ONLY WORKS IN ONE DIRECTION

Check for a minimum of 10 volts between terminal #3 and ground terminal #4 of the master relay while pushing the pump run switch. Is voltage present on terminal #3 of the master relay?