I picked up a rear-view mirror from a 2002 Axiom. It has auto-dim and Homelink. This should be a simple replacement but I have been trying to fine out which of the two wires is hot and which is ground. With two wires that should be easy but either way I hooked up the wires it didn't seem to work. So, does anyone know if one of connectors on the mirror is a constant on? I assumed that the wires for the map lights on the OEM mirror are hot and ground but that might not be correct either.