Last updated on March 25th, 2023 at 10:15 pm
Today, I am discussing a quite common issue that I faced many times. When the car is put in reverse gear, the backup camera says no signal, and the screen display turns blue.
A lot of followers also asked for solutions to this problem. I tried some troubleshooting steps. They proved to be very effective and fixed the matter.
I am listing and explaining all those solutions in this guide. So, keep reading till the end.
Why Reverse Camera Has Blue Screen and no Signal
There are a few common causes that turn the screen blue. For example, a loose or faulty power cable or signal wire is the reason. Another cause can be the blown fuse. Finally, the camera may be bad.
How to Fix the Problem?
First, we will apply some checks to diagnose the root cause. Then, we will fix the problem permanently. Here are the most common reasons and their solutions;
1. Connections are Loose
The signal between the camera and the Command unit is weak. Your car stereo has two wires including the power and signal cords.
Look at the back of the stereo. Check both wires and make sure they are firmly connected. Likewise, check the wires coming out of your camera if it is a wired one.
Look into the hinge area, the cable is tied there. The cables are not soldered properly.
2. Wires are Damaged
Also, examine the wires. Mostly, the wire at the entry point of the camera is faulty. It puts strain on the connection port and the cable. A damaged signal wire cannot transmit video signals.
Similarly, a broken power cord cannot supply power. You have to examine each connection wire minutely. Find the faults and eliminate the problem.
Sometimes, rodents, pets, or kids chew the wires. Hence, repair or replace the cables if they are broken, worn out, or exposed.
3. Fuse is Blown
A blown camera fuse causes the no signal issue. The fuse can have different locations in the system. Check it in the dashboard, near the AUX, or at the back of the monitor.
Take help from the user guide. Generally, backup cameras use a 3 amp fuse. You should test the voltage and install a new fuse.
4. Select the Correct Input
Some car head units offer different input options. So, you have to choose the right one. For example, there can be an input for GPS, DVD, USB, rear view, and camera.
Use the remote control or button of the head unit to toggle between different input options. Select camera, rear view, reverse, backup, or similar options.
5. Cables are Clipped
The car mechanics suggest that the cables should not be tied with the clips. Tight clips cut the cable underneath and you never know.
Use duct tape instead of clips. Likewise, tightly coiled wires also get damaged. You should make loose coils if there are any extra wires.
6. Head Unit is Bad
The car stereo or head unit is defective. Most likely, the resistor inside is faulty. It generally happens when the temperature is too hot or too cold. The solution is to replace the car stereo or head unit.
But, it is an expensive solution. The stereo may be pre-installed or you have bought it later. So, contact your car dealer or manufacturer in case of a pre-installed head unit.
Likewise, contact the stereo company from which you bought a third-party device. Send it for repair to save the cost.
7. Your Camera is Retrofitted
Your vehicle may not have a pre-installed reverse camera. Instead, it has a retrofitted (installed afterward). The fault may be in the installation.
Because fitting requires cutting and rejoining the cables inside the back window. The joints are then soldered. However, an expert can do it professionally.
Otherwise, you will face issues. Take a Multimeter, start the engine, and test the whole circuit. If you cannot do it, call an expert technician.
8. Reset Your Reverse Camera
Resetting can help fix the blue screen. The method may vary for different camera brands. However, a general method is as follows;
- Turn OFF your car and pop the hood
- Now, disconnect the negative cable and then the positive cable of the battery.
- Turn the car ON. Press and hold the horn or turn ON the headlights. This will drain the retained energy.
- Now, turn OFF the car and reconnect the battery.
- While reconnecting, attach the positive terminal first and then the negative.
FAQs About Reverse Camera
Following frequently asked questions will help you further in fixing your car backup camera.
Why my car’s reverse camera is showing a black screen?
The major reason is that your camera has no power or is connected loosely. Check the power supply. Moreover, check the wiring diagram in the user manual. Make sure the power cord is connected firmly.
How much does it cost to install a backup camera in my car?
Installing a backup camera costs around $100 to $300. It depends on the brand, material quality, type, and other factors. The installation and labor cost is around $50-$200. However, the complexity of the system can increase the cost.
Can I install a reverse camera in any vehicle?
Yes, backup cameras can be installed in any vehicle including a car, truck, or bus. Aftermarket cameras are universal and can work with any brand. Additionally, you have to install a head unit or display screen to view the image.
Why is my reverse camera not working with the engine running?
The major reason is the poor power supply. A reverse car camera requires 12V+ ACC power. Some engines can provide 9V. So, provide sufficient voltage and install a relay.
My experience says that wrong or faulty wiring is the most common cause. If you fix the wires and connections, your reverse camera blue screen, and no signal problem will be solved.