What to do if the reversing camera connection is poor?

[EleanorLee]

Check the wiring harness behind the camera to see if the plug is loose. You can unplug it to check for rust, and then reconnect it after cleaning. If there's no issue with the plug, the problem is more likely with the entire wiring harness. It is recommended to replace the entire wiring harness directly.

[VanAbel]

Last time my own car had an intermittent issue with the reverse camera. When I removed the trunk liner to check the wiring, I found that the wire connected to the camera had suffered metal fatigue from repeated bending during trunk opening and closing. This is a very common issue, especially in winter when plastic wire conduits become brittle and more prone to breaking. I replaced it with a soft wire of the same specification, soldered it properly, and used heat shrink tubing to prevent short circuits. I recommend not slamming the trunk too hard when opening or closing it, and ideally adding a corrugated conduit sleeve at the wiring location to slow down wire aging. Also, pay attention to the camera's mounting position—if it's too close to the edge of the license plate, it can get splashed with mud and water, leading to poor contact.