Why does the reversing camera have horizontal bars flickering?
4 Answers
The main reasons for horizontal bars flickering in the reversing camera are: 1. Poor line contact: It is necessary to check the connection between the wiring and the vehicle's installation in time to see if there is any loose connection. If so, it will naturally cause abnormal imaging of the reversing camera, and this can be resolved by reconnecting it properly. 2. Aging of the video power cable: Simply replace it with a new power cable. Here is some additional information: 1. Introduction and application scope: The reversing camera, also known as a parking assist system, or reversing visual system, vehicle monitoring system, etc., is widely used in various large, medium, and small vehicles for reversing or driving safety assistance. 2. Classification: It is mainly divided into two categories, namely large vehicle reversing cameras and car reversing cameras.
I found that horizontal line flickering in the reverse camera is most commonly caused by circuit interference. I personally encountered this issue, and later discovered it was due to a low-quality cigarette lighter adapter powering my dash cam, which caused snowy interference in the image when starting the vehicle. The vehicle's alternator generates interference currents during operation, and if the camera wiring lacks proper shielding or the power source is unstable, it can disrupt the video signal. Cars with aftermarket audio systems are particularly prone to this issue due to increased wiring crossovers. I recommend first trying a reliable USB charger and remember to unplug the dash cam's power cable from the cigarette lighter for observation - this often immediately resolves the problem.
I think it might be a loose wiring connector. Last week, my neighbor's older SUV had wavy lines all over the screen when reversing, and they asked me to take a look. After removing the rear bumper, I found that the clip on the camera wiring harness connector was broken, causing poor contact and image flickering when the car jolted. These plastic clips tend to age and break after three to five years, especially on vehicles that frequently drive on rough roads. When inspecting, pay special attention to the connectors near the license plate lights, as they are most prone to splashing mud and water, leading to corrosion. If you're handling it yourself, first try reconnecting the plug, spray the metal contacts with electronic cleaner, and finally, remember to wrap it tightly with electrical tape for waterproofing. If the connector is visibly oxidized and blackened, you'll have to replace the entire plug.
The camera unit itself failing can also cause this. Last month, a colleague's domestic car suddenly displayed colored stripes on the screen. After removing it, they found the CMOS sensor had failed. The camera is exposed to wind and rain all the time, especially when the plastic waterproof casing ages and cracks, allowing moisture to seep into the lens and damage the circuitry. Prolonged exposure to sunlight can also age the photosensitive elements, just like how smartphone cameras become blurry after long-term use. Nowadays, cameras are quite affordable, and replacing them yourself isn't difficult: buy one specifically designed for your car model, use a pry tool to remove the old camera, and plug in the new one. Just make sure the license plate light mount on the new camera matches—don't buy the wrong model. After replacement, remember to test whether the trajectory lines are properly calibrated.
