Does anybody know what functions are lost if the parking brake wire and backup wire are tapped into?

 

How about 1 thread for the same questions.

 

http://avic411.com/forum/viewtopic.php? ... highlight=

dont think you understand things, read a bit more and youll get a better understanding. oh and this has been asked before.

 

your not at a loss when connecting those wires, its to gain something.