I hope this topic isn't covered yet. But I found it very difficult finding directions on successfully installing a switch-bypass for the newer Pioneer units.
From research from the the web, I found two distinct sites:
and http://www.youtube.com/watch?v=g8HCcNy9QQQ. The two essentially explaining the installation for a 12-volt relay. But the latter pointing out (in the comments section) the simple grounding of a, SPSD-switch, was not possible.
Likewise, I learned, from Google searches, that a, SPDT-switch, acts as an conductor. Making the parking brake and ground wire conspire with e