because the
ICC only has one imput for the "reverse" sensor.
the sound from the reversing sensors now home throught the cars speakers.
so therefore it locks it out... there may be a way to tap into it and change thins... but without splicing wires it will be a challenge
__________________
BF Futura Dedicated E-GAS w/Ghia bling
Project: 86 ZL Fairlane, Red, Sunroof, 310,000KM