Join Date: Mar 2018
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Backup camera and ultrasonic sensors
I’m new, this is my first post. I just got an 04 toaureg and I love the car.
I do have the TPMS system fault error but that’s to be expected. Other than that the car has been meticulously maintained and cared for.
However, one (actually two) notable omissions are a backup camera and ultrasonic sensors when backing up. I have an idea for a solution but since it didn’t come with an owners manual or electrical system schematic I’m in the dark and don’t want to hunt them down at the moment.
The goal: use the existing navigation/radio tuner head unit as a display for newly installed backup camera when vehicle is put into reverse as well as have ultrasonic parking assist while in reverse only.
At the rear of the car, tap into reverse lights wires to power the camera and ultrasonic sensors (so that they are only active when vehicle is in reverse).
How would I set up so that only when the car is in reverse, will the display switch to the camera view? Is there a wire that is responsible for the display that can be switched with a 12v SPDT relay between standard view on normally closed contact and camera view on normally open? If so, could I power the coil side of the relay from the backup light wire at the fuse box (for 12v power to relay only in reverse, closing the normally open (backup cam) contact)?
Any help or ideas are greatly appreciated. Thanks.