Working on adding Auto Temp Control.
I ordered the Header harness on eBay, to add humidity sensor.
I thought maybe I could just connect the humidity sensor to the mirror connector, but the LIN Bus wire is missing. I only have mics on my rear view mirror.
I made a new harness for the RA4, adding the wiring for the temp sensor. Installed it, and it didnt work. Compared the connectors and had one of the wires in the wrong slot. Reconnected and it worked. But there is still something wrong, the climate controls reset when I turn off the truck. Going to put back the original harness I made in and trace all the wires on the new harness.