I bought a JVC KW V230BT car audio unit. I then bought an aftermarket camera. I connected the video cable to the back of the radio. I connected the hot wire on the camera to the reverse light in the back and to a ground cable on the same plug. The camera works when I put it in reverse, but only works when I actually push camera on the apps menu on the radio. I called JVC. They said I would have to connect rear trigger wire on the JVC head unit to the reverse trigger wire on the Altima. Can anyone tell me where this wire is. My altima never come with the upgraded radio, the base one. There is no wire at the radio that triggers the camera. I know this because I took a tester and none of those wires give me a positive reading. So if anyone knows where this wire is that would be great. If you know the color and where it is that would be even better