Where to Connect the Red Wire of the Reverse Camera?

[OMaximus]

The red wire is the control line of the reverse camera, usually connected to the reverse light. The following details are introduced: 1. Function: The red wire of the rear camera is the control line of the reverse camera, which can switch to the reverse image state under any screen condition. When choosing a car rearview camera, the most important factors to consider are the chip, waterproof performance, and of course, the actual effect of the image. 2. CCD and CMOS: CCD and CMOS chips are important components of the car rearview camera. According to the different components, they can be divided into CCD and CMOS. CMOS is mainly used in products with lower image quality. Its advantages are lower manufacturing cost and power consumption compared to CCD, but the disadvantage is that CMOS cameras have higher requirements for light sources.

[OJesse]

When installing a rearview camera system, that red wire is typically the power cable, specifically connected to the positive terminal of the reverse light. Every time you shift into reverse gear, the reverse light turns on, and this wire supplies power to activate the camera. From my experience, first use a multimeter to test the reverse light wiring harness to locate the live wire—usually red or white—then strip a bit of insulation to connect the red wire and secure it with heat shrink tubing or tape to prevent short circuits. Some car models have different wire colors, so don’t rely solely on color; it’s crucial to confirm voltage only appears when reversing. Connecting to the wrong wire, such as a constant power source, may keep the camera running continuously, draining the battery or blowing a fuse. After finishing, it’s best to test by shifting into reverse and checking the screen response. If unsure, consult the vehicle manual or a professional to avoid wasted effort.

[Miguel]

I've installed a reverse camera myself several times by directly connecting the red wire to the positive terminal of the reverse light. The process is quite simple: first, locate the wiring harness behind the reverse light, start the car, shift into reverse gear, and use a test pen or multimeter to check which wire has current—make a note of it. Then, strip the insulation from that part, twist the red wire onto it, and secure it properly. Don’t be careless—leave no gaps and wrap it tightly with tape. Common mistakes include loose connections or reversing the wiring, which can cause the camera to malfunction or even spark. I recommend also checking the fuse box to ensure the reverse light circuit is functioning properly. If you don’t have all the tools, look up video tutorials online and follow the steps—it usually takes about half an hour and isn’t too difficult. Beginners shouldn’t be afraid, but for safety, always remove the ignition key before working.

[JadeAnn]

It's my first time installing a rearview camera. The red wire should be connected to the positive terminal of the reverse light. When shifting into reverse, the light turns on, and the camera starts up conveniently. I followed the instructions that came with the purchase, which said to connect the red wire and the reverse light wire together without any random connections. Simply use pliers to strip the wires and connect them properly, being careful not to mix them up with the black wire for grounding or the yellow wire for video signal. During testing, sit in the car, shift into reverse, and check if the screen lights up. If it doesn't, the wire might not be fixed tightly or the fuse might be blown. Getting someone to help is more worry-free, and it won't take much time anyway. Don't worry about it being complicated; basic installation is something everyone can try.