Hi Mike, We do not have a published wiring diagram, however below is the wiring instruction: RedHat II coils have 3 wires - 2 wires of the same color (i.e., red or yellow) and 1 wire green with a yellow stripe which is an external ground wire. Since ASCO coils are not polarity sensitive, connect the 2 wires of the same color to the positive and negative power supply, the green/yellow would be the enclosure ground.