Retrofitted the back window to a powered one and need help wiring oem switch. I tried looking at schematics but I keep coming to dead ends. I need help identifying the wires and how to connect everything. Mahalo in advance gang.So far I've identified black as incoming power. Blue is up and green is down. I found that out by reading resistance. But when I hook up the motor wires to each wire, nothing works. I don't know which is ground or even if this siwtch needs a relay.