Where to Connect the Red Wire in a Reversing Camera?
2 Answers
The red wire in a reversing camera is the video signal line, which should be connected to the +12V of the reversing light. Below is relevant information about automotive reversing cameras: 1. Working Principle: The reversing camera system utilizes rearview technology based on visual measurement, relying on a camera at the rear of the vehicle to display road conditions behind the car on the central display screen. The driver can move a block representing the car body freely on the screen via the touchscreen. If the position is correct, the block will change from red to green. At this point, simply engage reverse gear and control the vehicle speed to complete automatic reversing. 2. Structural Components: The reversing camera system consists of three main parts: the camera device, control unit, and display.
I've installed rearview cameras several times myself. That red wire is the positive power cable, connected to the reverse light circuit at the rear of the car. Why connect it there? Because the reverse light only turns on when the gear is shifted into reverse, providing the camera with 12V power to automatically activate it. During the operation, I first remove the taillight cover to find the reverse light wire, which is often red, but the color may vary depending on the car model, so I usually use a multimeter to test the voltage for confirmation. Important note: Always disconnect the negative battery terminal first to avoid short-circuit risks. Secure the wiring with dedicated connectors or electrical tape to prevent loosening and leakage. Once, I didn't pay attention, and the red wire came loose, causing the camera to work intermittently and affecting reverse safety. The ground wire is black or brown and must be connected to a metal part of the car body, such as a screw hole. After installation, I always test by shifting into reverse to check if the screen image clarity is normal. Over long-term use, wire aging can easily cause problems, so I recommend checking every six months. Choosing a high-quality camera brand can avoid screen distortion. DIY is fun, but make sure you have all the necessary tools—wrenches and pliers are essential. Safety first—don't pull the wires too hard and hurt your hands.
