i've had the d2 for months and i've tried everyones suggestions for bypassing it i grounded the extra pin, i grounded the parking brake lead. i even hooked a switch up to the parking brake lead so it wouldn't be on all the time and still as soon as i start moving the unit says i have an improperly connected parking brake lead or whatever and doesn't let me use any functions till i stop moving i hear it has all this stuff inside that keeps the bypass from working and i get more frustrated the more i read everyone having success with it and for some reason mine just doesn't wanna