I am trying to hookup rear view camera to my jvc stereo. I need help finding the "reverse gear signal" under the dash.

2003 hummer h2

 

I am going to follow this one... What camera did you get?

 

I have the factory rear view camera option that I installed a few months ago.....

if its the factory wiring, then its the Light Green wire located in pin position #9 on the rear view mirror connector. This wire triggers the reverse lights to come on this activating the camera to activate. I would add the file here but the file is too large to post.