Incorrect switching of the trigger wire when mounting the rear view camera most often leads to the fact that the image does not switch automatically when the transmission is turned on, requiring manual activation in the menu of the head device. To avoid this error and ensure the stable operation of the review system, it is necessary to clearly understand how the signal and power lines between the video module and the video module are connected. tape-storage. Right. ploughing The connectors ensure the absence of interference on the screen and the correct response of the multimedia system to the driver's commands.
The basis of any installation is the exact following of the color marking of the wires, which, however, may differ from different electronics manufacturers. Standard. connection It involves the use of three main groups of contacts: video signal, constant power and control signal. Ignoring the nuances of grounding or using too thin cable often causes ripples on the display or a complete absence of a picture at night.
Before starting to disassemble panels and lay cables, you should prepare the necessary tool and check the completeness of the purchased equipment. The basic set usually includes the camera itself, a cable with a connector. RCA ("tulip"), instructions and a set of fasteners. It is important to determine the route of the wire from the trunk to the front panel in advance to avoid damage to the insulation against the metal edges of the body.
Principle of operation and types of video signal
A fundamental aspect of successful installation is understanding how the image is transmitted from the lens to the display. In the vast majority of cases, a composite connector is used to transmit an analog video signal, popularly known as a “tulip”. This standard is compatible with 95% of all available products on the market. 2DIN tape and individual monitors.
The signal is transmitted through the central conductor of the coaxial cable, while the outer braid performs the function of a screen against electromagnetic interference and at the same time is a “minus” of the video signal. The quality of the screening directly affects the purity of the picture: when laying next to the power wires of the acoustics or generator, a bad cable will start to “fonch”, creating characteristic horizontal stripes.
- 🎥 The analog signal CVBS is the most common and requires minimal equipment setup.
- 📡 Digital AHD/CVBS cameras often require the radio to be switched to the appropriate mode via the engineering menu.
- 🔌 The RCA connector must be securely fixed, as vibrations can cause contact to disappear.
⚠️ Attention: Do not confuse video in with video out. Connecting the camera to the output not only will not give an image, but also theoretically can damage the output cascade of the head unit, although in modern models there is protection.
Special attention should be paid to high-resolution systems. If you are installing a standard camera AHD or IPMake sure your radio supports these formats. Otherwise, the image will be black and white or completely absent, even if the circuit is assembled correctly.
Difference Between NTSC and PAL
Why is it important to know the standard? The NTSC standard (often used in cameras in the US and Japan) has 30 frames per second, while PAL (Europe, Russia) has 25. The mismatch between the camera standard and the tape recorder settings results in a black and white image or its absence.
Analysis of connector and wire color
The key stage of the preparatory work is to study the documentation for your particular device. Camera connection diagram It can vary depending on the brand: Chinese models Pioneer or Prology Colors may differ from European analogues Alpine or JVC. Usually, a separate output is present on the back of the tape recorder with the inscription “CAM IN”, “REAR” or “BACK”.
Let’s look at the color markings that are most common. The central contact of the RCA connector transmits a video signal, but a thin wire, complete with a "tulip", is critical to activate the parking mode. It is often painted pink and labeled as “Power Control” or “Trigger”.
| Wire function | Typical color | Appointment of contact | Where to plug in |
|---|---|---|---|
| Video signal | Yellow (RCA) | Image transmission | Camera In connector on the tape |
| Trigger (Management) | Pink/Orange | Switch on signal | Reversing lamp (+) |
| Camera power (+) | Red. | 12 volts serve | Reversing lamp (+) |
| Earth (GND) | Black. | Minus chain | Car body / Minus of the lamp |
It is important to distinguish between the power wire of the camera itself and the control wire of the tape recorder. Power (12V) is necessary for the camera to turn on, and the control wire tells the head unit that you need to switch the screen to video input mode. If you forget to connect the trigger, the camera will have to manually turn on through the menu.
Necessary tools and preparation for installation
Quality installation is impossible without proper tools. In addition to the standard set of screwdrivers and plastic blades for skin removal, you will need specialized materials to ensure the reliability of electrical connections. The use of conventional insulation in the car is not recommended due to temperature changes and vibrations.
To work with wiring, you will definitely need a soldering iron or a set of high-quality crimping terminals. The twisting of wires in the car is a potential source of problems, oxidation and loss of contact after six months of operation. It is also necessary to stock up on a corrugated tube to protect new wiring areas.
- 🔧 Multimeter: Mandatory to check for voltage on the lights and search for "plus".
- 🧵 Screeds and clips: for reliable fixation of the cable along the regular harnesses.
- 🛡️ Corrugation and Cambrian: to protect soldering sites and wire sections outside the cabin.
⚠️ Attention: Before starting any work with electricity, be sure to remove the negative terminal from the battery. This will save you from short circuit and accidental combustion of the fuses of the tape recorder.
In advance, determine the entry point of the wiring from the trunk to the cabin. Most cars for this purpose provide rubber corrugated in doorways or technological plugs in the floor. Pushing the wire “by the eye” through the body panels is dangerous – you can damage other systems of the car.
Step-by-step instructions for connecting wires
The installation process begins with the dismantling of the head unit. Carefully remove the tape recorder from the mine using removable keys or plastic shoulder blades to avoid scratching the torpedo. Find the appropriate connector on the back for connecting the camera. In some models, for example, the PioneerIt can be a separate mini-jack 3.5 mm, which includes both video and trigger.
Next, we'll move on to the trunk. Remove the skin from the trunk lid or hatchback door to access the back of the lights. Find the wire going to the reversing lamp. To do this, turn on the ignition and ask the assistant to turn on the rear gear, then call the contacts with the multimeter. The one where 12 volts will appear is our target wire.
☑️ Checklist before assembly
The power connection of the camera is made parallel to the reversing lamp. This means that the camera’s red wire connects to the “plus” of the flashlight, and the black wire connects to the “minus” (mass). The control wire from the tulip (usually pink) is also connected to the "plus" of the reversing lamp. Thus, when the transmission is turned on, the camera receives power, and the taper receives a signal to switch.
If the length of the regular cable is not enough for laying from the trunk to the front panel, it must be increased. To do this, use a copper wire with a cross section of at least 0.5 mm2. Place of connection be sure to solder and close with a shrink tube. Lay the cable along the regular harnesses, fixing screeds every 30-40 cm.
The main rule: The control wire (trigger) and the power wire of the camera must be powered by the same circuit - a reversing lamp. Only then will the system work automatically.
Set-up of the head unit and elimination of interference
After physical connection of all components, it is necessary to check the system operation. Turn on ignition and backshift. If an image appears on the screen but it is black and white or shaking, check the settings in the radio menu. Often switching the video system to PAL on NTSC Or vice versa, depending on the region of the camera.
The settings menu can also have a Mirror option. For rear-view cameras, it usually needs to be turned off, as the camera matrix already forms a mirror image. If this function is enabled, the parking lines will move in the opposite direction relative to the steering wheel.
- 🎨 Color: Saturation adjustment can help if the image is faded.
- 🔙 Parking lines: Included in the menu, help to navigate when parking.
- 🔇 Sound: Some systems allow sound to be broadcast from the camera (if there is a microphone).
In case of severe interference (ripples) on the screen, try to change the route of the video cable. Do not lay the tulip parallel to the wires going to the amplifier or gas pump. Also make sure that the camera is grounded securely on the car body at the installation point.
Frequent errors and methods of their diagnosis
One of the most common problems is the lack of response of the tape recorder to turn on the rear gear. In 90% of cases, this means that the control wire (trigger) is not connected or connected to the wrong contact. Check for 12 volts on the pink wire at the time the transmission is turned on.
Another common mistake is poor mass contact. The cameras consume a little current, but when the grounding is poor, the signal becomes unstable. Clean the contact on the body to metal before screwing the black wire. Also, do not forget about the fuse: if the camera does not burn at all, check the integrity of the fuse in the power supply chain or in the cable plug itself.
⚠️ Attention: If you use a camera with a separate microphone, avoid putting the microphone wire next to the speakers, otherwise you will hear a strong background and whistle in the acoustic system.
Sometimes users forget to remove the protective film from the camera lens after installation. This results in a cloudy, blurry image that cannot be corrected by settings. Always check the lens before the final skin assembly.
Advice pro: For additional protection of contacts from moisture, use dielectric lubricant. Apply it in a thin layer on the twists and connectors before removing them into the hidden cavities of the body.
Questions and Answers (FAQ)
Do I need to buy an additional relay to connect the camera?
In most cases, relays are not required, as the camera's consumption current is small. However, if you are putting a camera with high-power IR illumination or multiple cameras, using a relay to unload the circuit of the reversing light will be a smart decision.
Why does the image appear with a delay of 2-3 seconds?
This is a staff delay of many Android-magnets associated with the software survey of the port. You can speed up the process by disabling the “fast start” settings of the system or updating the firmware of the head unit.
Can I connect the camera to a tape recorder without a screen (via an FM transmitter)?
No, video transmission requires a physical video input. FM transmitters only transmit audio signals. For systems without a screen, there are special mirror monitors that connect in a similar way.
What if there is no RCA connector on the tape?
You will need to purchase a special adapter (ISO-adapter) for your model of the tape recorder, which displays the video signal on the standard "tulip". These adapters are often sold separately for the Sony, Kenwood and Pioneer brands.