After searching this forum and others for a suitable trigger wire to activate the backup camera on my new aftermarket Pioneer head unit, I wanted to pass along to all here a wire that worked for me. I did not want to do like others did and run a long wire all the way to the back of the car and tie into the reverse lights - why do that if you can access a suitable wire in the dash?
Note that when installing a backup camera, you need a 12v source of power to power the camera itself, you need a ground wire point, and on aftermarket head units, there is a "trigger wire" that tells your head unit to display the rear camera video when you shift into reverse.
Another member here advised that there is a black module above the fuse block above the glovebox in the dash that has some blue/yellow wires, and said that "any of them seem to work". I got my meter out, grounded the black lead, and poked into the insulation of these wires in that module (which is a bitch to get out, and a bigger bitch to get back IN to the slots it latches into).
As you will see in my attached pictures, one of the blue/yellow wires did not provide 12v when reverse was engaged, but the photo shows the one that DOES (at least in my car it does). So, that is the one I tapped my reverse wire into.
I advise using an accessory 12v source of power for the camera itself. You want the camera head powered up full time while the ignition key is in the accessory or RUN position. I would not tie it to the car's reverse lights, because this could add delay / latency that would delay the camera signal when you shift into reverse. You want that camera head powered up and to pop up the picture as soon as you shift into reverse. Even still, some head units have a bit of a delay before the picture appears, which we can't help.
Maybe this tip will help someone here.
Note that when installing a backup camera, you need a 12v source of power to power the camera itself, you need a ground wire point, and on aftermarket head units, there is a "trigger wire" that tells your head unit to display the rear camera video when you shift into reverse.
Another member here advised that there is a black module above the fuse block above the glovebox in the dash that has some blue/yellow wires, and said that "any of them seem to work". I got my meter out, grounded the black lead, and poked into the insulation of these wires in that module (which is a bitch to get out, and a bigger bitch to get back IN to the slots it latches into).
As you will see in my attached pictures, one of the blue/yellow wires did not provide 12v when reverse was engaged, but the photo shows the one that DOES (at least in my car it does). So, that is the one I tapped my reverse wire into.
I advise using an accessory 12v source of power for the camera itself. You want the camera head powered up full time while the ignition key is in the accessory or RUN position. I would not tie it to the car's reverse lights, because this could add delay / latency that would delay the camera signal when you shift into reverse. You want that camera head powered up and to pop up the picture as soon as you shift into reverse. Even still, some head units have a bit of a delay before the picture appears, which we can't help.
Maybe this tip will help someone here.
