Hello Russell;

My name is Peter. I am a retired field service appliance technician.

Behind your control board you have 3 door contact switches. The top one is, "Normal" (Close operation), The middle one is, "Intermediate" (Closed operational), and the bottom switch is, "Door closed".

Usually it make no difference if the wires are the same color. You need to do a trial and error. Connect the wires to the door switch. If the microwave does not work reverse them. You will not damage the microwave.

Go into the following website, put in your model number located on a label on your microwave and you will get diagrams, and perhaps a wiring diagram. Water Filters Lawn Garden Appliance Parts