Originally Posted by crystalworks

It's PWM voltage... due to the adaptive braking system I believe.

There are many ways to do a backup cam on LCI e53's. You are going to need to use a relay to use the signal wire from the reverse light. I have mine being triggered by the PDC system which is nice as I can also manually trigger it by hitting the button on the console. Though this does require some extra work.

Does your Xtrons unit provide a cam+ wire in the harness? Some of the newer android units actually have a voltage supply wire in the harness.