Is the C valve getting current and magnetism?
sounds, like you need to get a real repair manual. I wonder if meyers has one for sale online?I've watched videos on YouTube trying to figure out what the issue could be. I'm not having much luck what so ever. I've gone directly to meyers website, using the troubleshooting tool page. No luck.
This should do it. They have a chart with the wires that get power for each function. you will have to test each pole of the switch and see if the power corresponds. Then you have to test to make sure if it is the switch or the harness at fault.Just found this
MeyerPlows.info - Meyer Toggle Switch Wiring Diagram