Just tried fitting a kenwood DDX unit but it wouldn't switch on/off using the key, just via the power button at the front.
Before anyone suggests it, yes I did try swapping the red and yellow wires!!! But to no avail.
I have a Parrot ck3100 fitted too, so I even tried it with the Parrot loom removed, but made no difference.
Anyone any ideas? So close yet so far!