I grounded the parking brake wire near the parking brake and put it on a toggle switch, i can now use the toggle switch to operate the parking brake. I next disconnected the mute wire and put it in the open space which was above the ground wire, i then grounded the other to the frame. The navi controls are still turning off when i hit about 15mph, do i have to ground the mute wire to the black ground wire? Also, do i have to ground the parking brake wire from the connector or will the way i did it suffice? i am still getting a message telling me the parking brake is incorrectly hooked up but i am thinking this could be from a poor ground from the mute wire? Sorry if this sounds like crap, i am not much of an electrical person though.....i would greatly appreciate any and all help.

Believe this is what you are looking for. It needs to be bypassed:

http://www.avic411.com/forum/viewtopic.php?t=14

i have done the bypass, the problem is that once i hit about 15 mph the navi controls cut off as if the parking brake is not on. do you think the bypass wire could be grounded incorrectly? I am still getting a warning at the beggining that is telling me my parking wire hooked up incorrectly as well, all i did with that wire was put it on a toggle switch and that aspect of everything works fine! i can flip the switch and it will turn the brake on or off.

Reread the bypass instructions, double check your wiring. Make sure you moved the wire to the appropriate slot on the harness.