i hooked up my rearview camera one wire to ground and the other wire to the backup light. i posted this before and i was told to hook it up to a switched source but my problem with that is if i do that the camera wont come on when the car is in reverse.. :?

If you have your nav system hooked up properly to a reverse wire in your car, the navi will switch it on when you put the car in reverse

whtcrxghst is right, make sure z1 is installed properly and the setting is set to camera. Also, for the life of the camera, maybe connecting it to the + switched side of the reverse wire would be better.

If you plan to utilize the rear view split-screen option to veiw a trailer while you are driving, for example, you will need to hook the camera power lead to the accessory circuit of the car, and hook up the reverse lead input on the Z1 to the reverse light wire in your car.