I have a Type 8A18Z-2 Relay Transformer for Evaporative cooler Which I bought with a used Master Cool Cooler. I need a wireing Diagram. The problem is the thermostat terminals are not identified on the cover . I can't get the motor to turn onless I jumper L1 andeither the high or low terminals. Thank you, Fred Schaupp at gotacres@hotmail.com. in Topock AZ whwere it's 120 Degrees, Please help me