I just installed a backup camera however I am having trouble wiring it. I've read that I need to tap into the reverse wire, however I went through many wires and couldn't figure out which one is it. My cameras wire is designed to be wired in the trunk, so the wire under the hood or dash is not a possibility. 2003 G35 Sedan
For the objective of? turning it on? NO! you should use that wire, faucet it for sure, with a speedy connect, for a 12V source wire, use a relay, and that 12V source wire, and that is advisable to do 2 body grounds, one for that 12V source wire for the relay to kick on/off, and one from the digital camera that you're powering from a right away link from the battery (use a 10A inline fuse)
You can remove your tail light and tap into the reverse wire there. It is easy to find just look at your reverse light bulb and use a multimeter to test for positive and negative (that would be the right way to do it at least). If your wanting to have the camera able to be on all the time and viewed from the headunit then you would need to wire the camera to switched accessory so it has power when the car is on and hook up your head units wiring (which you will need to do anyway to make the h/u switch to b/u cam when you go into reverse) to the reverse wire.
