I have dom's unit with pnp harness, and a backup camera.. I had everything wired up..

Blue from dom's unit to reverse light
Green/White/White/Black from unit to ground
Red wire going to Acc power

Camera wiring

Red to 12v power
Black to ground

I kept blowing fuses.. Also, there is a black wire hanging off of the pnp unit, what is that for.. I thought ground, I grounded it and still kept blowing fuses.. Any ideas????

willie