I got this Nav unit installed last weekend. I had to capture the VSS signal prior to the ECM, but other than that, it was a straight forward install that turned out very nice. But I do have a question. I wasn't able to find a place to capture the signal for when the car is put in reverse. Can anyone help me with that? According to my wiring diagrams, the reverse lights are multiplexed and turned on and off by the REM. They are constantly powered and the REM grounds them to turn them on and off. It uses a signal off the digital transmission gear indicator. I didn't get a chance to measure that signal, but it looks to me like it's a 5V reference signal and the Z1 wants to see 12V. Anyone know for sure or have any ideas? The only thing I can think of is to build my own reverse switch somehow.