I lied again, here's some wiring. At the top center are three electric components of the refer. On the left is the A/C thermostat. It keeps the evaporator from freezing. In the middle is the main power relay and on the right is the deactivation solenoid/relay. It cuts out the system when the engine key is off so it won't be on and load the engine at restart. Slick, love it. The black cover to the right, is the refer power bus. The ground bus is to the left of it. In case your wondering, that heater pipe at the top, is cool to the touch. It has an internal exhaust pipe. The one you see is for fresh, combustion air. Both gases are exchanged at the same through hull.