Since this question seems to come up quite a bit, I thought I'd make a single thread to identify common signal lines required for aftermarket NAV or camera installation for the three different factory-supplied stereo types.
For the navigation unit it is pin 3 of connecter K6 (white wire)
K6 looks like this:
For the head unit with a separate amplifier, it is pin 4 of connecter K9 (white wire)
K9 looks like this:
For the head units with a built-in amplifier, it is pin 3 of connecter K3 (white wire)
K3 looks like this:
For the navigation unit, it is pin 5 of connecter K6 (green wire)
Again, K6 looks like this:
For all other models, you have to use the connecter for the backup monitor in the headliner. I can’t find reference in the schematics (AP1?) but it is the green wire
on this connecter:
Factory Backup Camera
For the navigation system, it is pins 21 to 24 on connecter K7
K7 looks like this:
Pin 21 is the camera’s ground.
Pin 24 is supply voltage for camera
Pin 22 is the positive lead for the video signal
Pin 23 is the negative lead for the video signal
For all other models, again you need to use the connecter for the backup monitor.
brings ground to the camera
brings supply voltage to the camera
is video positive
is video negative
I hadn’t thought of it at the time when I did my installation, but power and ground must
be on this connecter. The wires left over are blue and violet. Anyone want to take their roof console down to measure out the lines?