With thanks for excellent service from Pier28, I bought my first SG9665GC at the end of August. The camera has been great, validating all the good comments in the forum. I initially used the cigarette power adapter that came with it, but decided to switch to a hard wire. The cig adapter used up my main power socket and also did not work some of the time without reseating or moving the adapter several times.
I bought the CPUSB01 last week from Pier28 and tried to install this afternoon on our 2007 BMW 328i (E90), but have not succeeded thus far. Two issues -- first, when power up occurs, the camera screen comes on for a split second and then goes off even when there is power to the unit and when the blinking light says it is recording. No matter which button I tap, the screen wont come on except for that 1/2 second at startup. When I switch back to powering via the cigarette lighter adapter, the screen comes on and works just like before when you hit the menu button (lasting for several seconds before turning off). Second, I've tried multiple fuses on the 2007 BMW and can't get it to reliably turn on when the car starts and stay on until the car is turned off. I used the instructions above and the helpful video from US Dashcam for the install.
Any ideas? These issues are no doubt a reflection of my limited knowledge, so I'm hoping someone else is wiser. I really like the camera, so I'd like to get reliable power to it. Thx.