Can't get head unit to dim with instruments

Guard Dad

[QUOTE=Ron;1325676]connect the ILL wire from the HU to both the white and red cable, pins 8 and 9? What voltage if any, are you getting from the white cable, pin 8?[/QUOTE

THIS IS GETTING INTERESTING. The red is constant hot (the red wire becomes orange/white in the Scosche connector) the white is INVERSELY variable with the Instrument Panel dimmer setting! When the IP is full bright the voltage is zero but when the IP is on full dim the voltage is +12v! And to complicate matters the Scosche connector doesn't provide a wire that connects to the OEM white wire.