Where and how to connect a rear view camera in a car: all options + step-by-step diagrams

A rear view camera has long ceased to be a luxury - it is a necessary safety element that saves you from accidents, scratches and fines for incorrect parking. But many car owners are faced with a problem: they bought a camera, but it’s not clear how to connect it correctly. Installation errors can lead to image flickering, incorrect activation, or even a short circuit. This article will help you understand where can I connect the rear view camera? depending on the type of vehicle you have and the equipment you have.

We will consider all possible options - from a standard connection to a standard radio to non-obvious solutions such as displaying images on a smartphone or an additional monitor. We will pay special attention connection diagrams, the choice of power cord and typical mistakes that even experienced installers make. If you are not confident in your abilities, it is better to entrust some methods (for example, integration with a CAN bus) to professionals - but most problems can be solved yourself.

1. Connection to a standard radio with camera support

The most common and reliable way is to connect to standard radio, if it natively supports the rear camera function. Most modern head units (starting with budget ones) Pioneer MVH-S310BT and ending with bonuses Alpine iLX-F411) have a special connector CAMERA IN (usually RCA or mini-HDMI). The main advantage of this method is that the camera is automatically activated when reverse gear is engaged.

To connect you will need:

• 🔌 Video cable (usually comes with the camera, but sometimes an extension cord is required).
• 🔋 Power cord (connects to reverse lamp or directly to fuse box).
• 🔧 Adapter (if the camera connector does not match the radio connector, for example, with RCA to mini-HDMI).

The connection diagram is simple:

1. Connect the video cable from the camera to the connector CAMERA IN on the radio.
2. Camera power (+12V) connect the reverse lamp to the wire (usually purple or green, but it’s better to check with a tester).
3. Negative wire (GND) secure to the body or battery.
4. In the radio settings, activate the camera function (usually in the menu Settings → Camera → On).

2. Integration with universal radio (2 DIN)

If your radio does not have a built-in camera connector, but supports universal multimedia systems (for example, Android Auto or Apple CarPlay), can be used AV input or USB port. Most format tape recorders 2 DIN (for example, Joying JY-UQ135N4G or Xtrons PB786APB) have a hidden connector for an additional camera.

Here's how to do it:

• 📺 Find the connector on the rear panel of the radio AV-IN (usually this is a combined connector with video and audio inputs).
• 🔌 Connect your camera via RCA adapter (if the connector is non-standard, a soldering iron may be required).
• 🔋 Take the power supply for the camera from the reverse lamp wire or through a relay (if you need constant power).
• 🎛️ In the radio settings, select the signal source AV-IN or Camera.

An important nuance: some Chinese radios require camera activation via CAN bus. This means that when reverse gear is engaged, the radio must receive a signal from the on-board computer. If this does not happen, the camera will have to be turned on manually - which is inconvenient. Solution: use CAN emulator (for example, CanBus Decoder for Toyota or VW).

3.Connect to rear view mirror with monitor

If your car does not have a radio with a screen, but has rear view mirror with monitor (for example, Auto-Vox M1 or Boyo VTK430), this is an excellent option for connecting a camera. Such mirrors usually have a built-in AV input and automatically switch to the camera image when a signal is given.

Advantages of this method:

• 🚗 Does not require replacement of the standard radio.
• 💰 Cheaper than buying a new multimedia system.
• 🔄 Automatic shifting when reverse gear is engaged.

Connection diagram:

1. Connect the camera video cable to the connector AV-IN on the mirror.
2. Camera power (+12V) take the reverse lamps from the wire.
3. Mirror power (+12V constant) connect to the battery via a fuse 5A.
4. Set the mirror to switch automatically (usually this is done through the menu or a jumper on the board).

How to check the polarity of the reverse lamp wire?

To find the correct wire, turn on the ignition and reverse gear. Using a multimeter in voltage measurement mode (20V DC) check the wires one by one in the harness going to the lamp. On the right wire there will be +12V only when reverse gear is engaged. This is usually a purple, green or yellow-black wire, but the color scheme depends on the car model.

4. Outputting images to a smartphone or tablet

If you don't want to bother with wires or you don't have a radio with a screen, you can display the image from the camera on smartphone or tablet. To do this you will need a camera with Wi-Fi module (for example, Vantop H612 or Yada Digital Wireless) or Bluetooth transmitter.

The advantages of this method:

• 📱 No need to lay a video cable into the salon.
• 🔄 You can use your smartphone as an additional monitor.
• 📲 Suitable for rented cars (does not require electrical intervention).

Cons:

• 🔋 Your smartphone battery runs out quickly.
• 📶 There may be image delays (lag) with a weak Wi-Fi signal.
• 🚫 Not all cameras support automatic activation during reverse gear.

How to connect:

1. Install an application from the camera manufacturer on your smartphone (for example, Car Camera or WiFi Car DVR).
2. Connect the camera to power (reverse lamp or cigarette lighter).
3. Activate the mode on the camera Wi-Fi Hotspot and connect to its network from your smartphone.
4. Launch the application - the image from the camera will be broadcast on the screen.

5. Connecting to an additional monitor

If your car does not have a radio with a screen, but you do not want to use a smartphone, you can install additional monitor. This is true for trucks, minibuses or old cars. Monitors are:

• 📺 Built-in (for example, in the headrest or dashboard).
• 🖥️ Invoices (attached to the dashboard or windshield).
• 🔄 With automatic activation (turn on when a signal is given from the reverse lamp).

Example of popular models:

Monitor model	Screen size	Resolution	Auto activation	Price, rub
Auto-Vox CS-2	4.3"	800×480	Yes	3 500
Boyo VTL430	4.3"	800×480	Yes	4 200
Rear View Safety RVS-770613	7"	1024×600	Yes	8 900
Pyle PLCM7500	7"	1024×600	No	6 500

Connection diagram:

1. Install the monitor in a convenient location (for example, on the dashboard or headrest of the front seat).
2. Connect the video cable from the camera to the connector AV-IN on the monitor.
3. Monitor power (+12V constant) connect through the fuse to the battery.
4. Camera power (+12V) take the reverse lamps from the wire.
5. If your monitor supports auto-activation, connect the wire REVERSE to the reverse lamp.

Check the compatibility of the camera and monitor connectors|Select an installation location (do not block the view)|Run the cables along the standard wiring|Insulate all connections with heat shrink|Check the operation of the system before final assembly-->

6. Connection to a recorder with a monitor

Many modern DVRs (for example, BlackVue DR900X or 70mai Pro Plus+) have a built-in screen and support connecting an additional camera. This is convenient if you do not want to install a separate monitor or change the radio.

How it works:

• 📹 The recorder records video from the front and rear cameras.
• 🔄 When you engage reverse gear, an image from the rear camera automatically appears on the recorder screen.
• 💾 Video from both cameras is saved to the memory card.

Connection diagram:

1. Connect the rear camera to the connector CAM-IN on the recorder (usually a mini-USB or proprietary connector).
2. Recorder power supply (+12V) connect to the cigarette lighter or directly to the battery through a fuse.
3. Take the power supply for the rear camera from the reverse lamp wire.
4. In the recorder settings, activate the function Reverse camera and set up automatic switching.

7. Connection to the all-round viewing system (360°)

For maximum comfort, you can integrate a rear camera into the system all-round view (for example, Valeo Park4U or Bosch Parking System). Such systems combine images from 4 cameras (front, rear and two side) and display virtual top view on the radio screen.

Connection features:

• 🔧 Required image processing unit (usually included with the system).
• 📡 Cameras must be calibrated - otherwise the picture will be distorted.
• 🔌 Power for all cameras is usually taken from one source (for example, a fuse box).

Connection diagram:

1. Install 4 cameras (front, rear and two side).
2. Connect them to the image processing unit.
3. Output the video signal from the unit to the radio (via AV-IN or HDMI).
4. Connect the power supply to the unit and cameras to the battery via relays and fuses.
5. Calibrate the system (usually this is done through the radio menu or special software).

How to calibrate the surround view system?

Calibration usually requires:

1. Place the car on a level surface.

2. Turn on the system and select calibration mode in the menu.

3. Follow the instructions on the screen (for example, drive a few meters forward/backward or draw lines on the asphalt).

4. Save settings.

If the calibration is lost after replacing wheels or suspension, it must be repeated.

Typical mistakes when connecting a rear view camera

Even experienced car owners sometimes make mistakes that lead to a camera not working or even damage to the electronics. Here are the most common:

⚠️ Attention: Never connect the camera's power directly to the battery without a fuse! A short circuit can damage not only the camera, but also the body control module (BCM).

Error checklist:

• 🔌 Poor nutrition — the camera is connected to a constant +12V instead of the reverse lamp wire (the camera will always work, and not just when reverse is turned on).
• 📺 Incompatible connectors - for example, trying to connect RCA to HDMI without adapter.
• 🔋 No fuse - may lead to a fire in the wiring.
• 📶 Poor contact — oxidized or loose wires cause flickering of the image.
• 🔧 Wrong polarity - if you mix it up + and –, the camera may burn out.

How to avoid problems:

• 🔍 Before connecting, check all wires with a tester.
• 📏 Use heat shrink tube to isolate connections.
• 🔧 If you are not confident in your abilities, contact an auto electrician - the cost of installing a rear view camera in the service starts from 1,500 rubles.

FAQ: Frequently asked questions about connecting a rear view camera

Is it possible to connect a rear view camera to the radio without an AV input?

Yes, but this will require FM transmitter with AV input or Bluetooth adapter. However, the image quality will be worse than with a direct connection. It is better to consider the option of replacing the radio or installing an additional monitor.

What voltage should be on the reverse lamp wire?

When you engage reverse gear, the wire should appear +12V. If the voltage is less (for example, +5V), the camera may not turn on. Check the wire with a tester or connect the camera via a relay.

Why does the camera work all the time, and not just when reverse is turned on?

Most likely, the camera's power is connected to a constant +12V (for example, from a cigarette lighter). You need to reconnect the power to the reverse lamp wire or use a relay controlled from this wire.

Is it possible to connect a wireless camera to the standard radio?

Only if the radio has Wi-Fi or Bluetooth module. In most cases, wireless cameras only connect to smartphones or special Wi-Fi-enabled monitors.

What fuse should I put on the rear view camera?

Optimal denomination - 2A–5A. The fuse is too large (e.g. 10A) will not protect against short circuit, but is too small (for example, 1A) may trigger falsely.