ok i just bought the 8200nex

and just grounding the parking brake wire doesn't work

i have tried the trick with the on screen bypass with no luck

i have watched a few videos where people use the 8100nex and have noticed the power off button doesn't completely shut the radio off like on my 8200nex

 

is there a way to bypass it without pulling the radio back out again?

if not whats the best way?