I've had  to replace radio twice. Rev group put in replacement at rally 2 years ago. It died last season and I thought it was connection but Rev Rally team looked at this year and said it was bad. I got Sony to send me a replacement.  I hooked all wires and connections back using same REV modified harness. One exception was a 2 pin connector off of the modified harness. It has  yellow and black wires going to it  I saw a 2 pin connector coming from chassis wiring and it has red and black wires..I wasn't sure about hooking them up together.  The radio,backup camera,Bluetooth all are working it's just when I press the home button the options are e displayed but the screen goes off quickly.  I didn't see if they were connected originally, since I'm not sure if the Rev group had disconnected them while trying to service the radio. I'm leary of connecting the wires since it is sort of working. Anyone have experienced this. Thanks