I used the positive wire to provide voltage for a reverse trigger for a backup camera system I just installed (a few pics and lots of successful info forthcoming if you're following that thread). Ever since I started carefully disassembling several interior trim pieces, whenever the ESV is in reverse, the backup sensor lights all flash on and the chime starts immediately donging like it's about to hit something- the full tilt last pattern tone. Ahhhhhhh!
The only thing I can come up with is the system is shorting out because I tapped the passenger side taillamp assy. for the positive backup lamp wire. If it's not a secure connection, I wonder if that's the cause. It was doing this before that tap was even connected to anything on the other end in the dash. Ideas?