How to Fix the No Signal Display on the Rearview Camera?
3 Answers
Rearview camera displaying 'no signal' indicates a signal loss, and it's necessary to check if there are any issues with the wiring. When the car is just started, it might interfere with the operation of the rearview camera. The solution can be to try restarting the system. Electromagnetic interference from other electronic devices inside the car. The solution can be to turn off the radio or music player and then restart the system. If the rearview camera's probe is damaged, the solution is to remove the camera and connect it to someone else's navigation system to test if the camera is faulty.
Oh no, the sudden "no signal" display on the reverse camera can be really frustrating. Last time I encountered this, I first checked if the camera lens was covered by mud, but it turned out the wiring harness in the trunk lid got crushed. Ended up spending 200 bucks at the shop to get the wiring redone. You should pay extra attention to those flexing wire sections - especially on vehicles with aftermarket reverse cameras as they're more prone to issues. If I confirm the camera itself isn't broken, I'd also test whether the reverse lights come on - if they don't, there's an 80% chance the reverse trigger wire is broken or a fuse has blown. Oh, and don't forget to check if the video connector behind the head unit has come loose - this thing can develop poor contact after some bumps. If all else fails, take it to a professional repair shop immediately - after all, we can't compromise on reversing safety.
Just helped my neighbor troubleshoot a 'no signal' issue yesterday. The approach should be from simple to complex. Start with the easiest steps: Have you cleaned the camera lens? Try unplugging and re-plugging the cable connectors. If the screen can switch to other displays normally, the host unit is likely not the problem. Then focus on the wiring part—use a multimeter to check the reverse trigger voltage and perform a continuity test on the signal line. I once found wiring chewed through by mice in a friend's car. For aftermarket devices, pay special attention to loose power connections. Water ingress and rust in the camera connector are also common culprits; spraying some rust remover might do the trick. Remember to disconnect the battery's negative terminal during repairs—working with live circuits can easily fry the circuit board.
