I am trying to wire a Honeywell 7500 series thermostat to a Goodman gph1560m41a. The schematics on the manuals do not match. I get heat when I turn on the cold and no cold or anything when I turn on the heat. This is a 24-volt system (on low voltage), 2-stage hot/cold with optional 3rd stage heating. I need to know the wiring schematics.