Rear View Camera Fails with Engine Running: Possible Voltage Issue?

Hello

There was already such a topic, but it was closed. I connected the rear view camera to the multimedia station. When the ignition is on and you shift the lever to the R position, the camera turns on and works beautifully. The problem begins when the engine is started. Then the camera does not work and the message "NO video signal" appears on the monitor. I connected via a relay - as suggested, and still the same. Has anyone encountered such a problem and knows how to solve it? My guess is that it is about increasing the voltage after starting the engine and running the alternator. How to eliminate this problem? Voltage stabilizer some or what ??? It is strange that when connected via a relay it is the same ...

Please also check if the relay is properly connected: I will add that I did not pull a separate mass from the battery, but I borrowed the mass from the lamp. + I gave directly from the battery.



Thank you very much in advance.

What is this radio with a monitor in this car - this is the basic question ?? Fairies have holidays.

Does it matter? If so, then the "rice" DVD / GPS multimedia station
Such as here:



Since it works fine after turning on the ignition, it is not really a matter of the display, but there could even be an ordinary LCD screen? Right or am I wrong?

You're wrong. Because to activate the camera, many multimedia stations have a special input activated by turning on the reversing lights ("rear"), and the camera is always powered - (after ACC).

That's right. The control power supply from the rear light is connected to the "rear" control cable (in my case "back"). Otherwise it would not work after shifting to reverse with the ignition on. The problem starts when the engine is running. The controls are OK.

The power of the rear view camera is not to be connected to the rear light only to the ACC + On line, without any relays. It is done in such a way that with the heat it emits, and sometimes with an additional resistor - a heater, it de-iced in winter.

Welcome back.

I have successfully resolved the problem. The matter is very simple. Lamp cannot be connected to power. The power supply must be separate, preferably from the fuse box, making use of the free space and connect by inserting the fuse. (You can also, for example, from the cigarette lighter if someone has in the trunk). Only the controls for the reversing camera should be taken from the reversing lamp. Maybe it will be useful to someone. I saw somewhere in the movie how someone connected the power and control of the same cable and it worked. However, this is a MISTAKE !! It should be connected as I wrote above.

Regards

After all, my colleague Krzysztof Kamienski wrote about it clearly and twice ...

Hello ,

It will heat the cutlet, namely the control wire is the one that is on the video cable so short red ????? (coming from the czincz)

Regards

Yes. That's right.

Hello,

I will tell my story, I count on your help - because I don't have the strength anymore.
So this is how I bought android stations with a rear view camera. Previously, the webcam was connected to the station directly without a relay and it worked. I changed the station to a newer one. faster - but as it turned out, she is probably more sensitive, a few friends and opinions on the Internet helped me decide to connect the webcam via a relay.



So, I found a diagram like this:




I bought such a relay and a stand:


I connected everything according to the scheme:
87 - I connected the power supply from the cigarette lighter. which appears after ignition
85 - weight from the car body
30 - camera signal
86 - signal from reverse

The webcam seems to work - but the relay makes a strange voice that.
1. Howls and humms softly when dipped headlights are on
2. Hisses and buzzes loudly when the dipped beam headlamps are turned off

Video:
Low beam on for 18 seconds, engine running
For 19 seconds, the dipped beam headlamps are off, the engine is running

Enter the camera type or description of the camera cables.

This is what it looks like:

michul3k wrote:

85 - weight from the car body

If I were a colleague, I would choose a more reliable mass point.
For testing purposes, could a colleague connect ground (85) directly to the (-) battery?

What car do you mount it on? As the lights are pwm controlled, it will be circuses, connect directly to the reverse light switch on the gearbox, the relay can be bypassed

PWM? Auto to Seat Leon - 2008 r.

Well, see the same solution in Skoda Link

But my reverse light works and the camera works - only this sound is wrong ..

michul3k wrote:

But my reverse light works and the camera works - only this sound is wrong ..

Precisely because it is a PWM control.

hello I have a similar set connected to xmomax rsu412 bt
camera connected to the rear camera input one wire only plus connected to the reversing light. The mass has a circuit from the radio after the camera conducts. Everything works fine. Maybe you have the radio connected to the power supply and not the key from the ignition, there was such a problem for me. I had to change the power supply in the radio cube and that the radio would turn on only after turning the key, I had the power supply from the ignition switch and the same problem in the radios. from a market other than the European plus, the ignition switch is in the place of a permanent plus powered by this and only that. Swap those ERM wires with constant plus and it should work fine

Despite the fact that the first relay was briefly checked and everything was ok, I bought the second relay and it is ok !!
Some miracle, there is no such noise as with the first relay - the webcam works and it's OK. There is a slight buzz - like a current flow, but to hear it, you need to have a transmitter next to your ear.

michul3k wrote:

The webcam works - but the relay makes a strange voice that.
1. Howls and humms softly when dipped headlights are on
2. Howls and buzzes loudly when the dipped beam headlamps are turned off

And it's not sometimes the problem that his relay is not there a rectifier diode plugged in parallel with the coil ? Since the power supply is after PWM?

hello, I had a case that after turning on the engine the camera did not work no signal but with the engine off and turning on the reverse camera worked and the solution is very simple I bought a car relay BLOW (4120) 12V / 40A for PLN 9 on Allegro description of how to pay 87 plus after ignition [permanent plus] 85 minus 86 plus from reverse 30 plus to the camera EVERYTHING WORKS Regards [url=https://obrazki.elektroda.pl/9487010600_1672729305.jpg]

Well, that's what I was looking for Half a day yesterday I was fighting why this contraption doesn't switch on, and here you just (or maybe even) need the simplest relay (IMO, a weaker one is enough, 40A is a lot for a webcam). They should write to these recorders in the manual that without a relay, it is unlikely to work as it should. Tomorrow I am correcting the installation, I have a cigarette lighter socket in the trunk, it will do without messing around . Of course, the camera housing should be grounded for it to buzz.

I recently connected the camera in Cruze from the cigarette lighter to the reversing light. All right. Plus is plus, so power is needed. Connecting issue.
Cinch receiver - cinch camera plus camera and plus on cinch can be connected together, then it works.

mateklos wrote:

I recently connected the camera in Cruze from the cigarette lighter to the reversing light. All right. Plus is plus, so power is needed. Connecting issue.
Cinch receiver - cinch camera plus camera and plus on cinch can be connected together, then it works.

Well, but for the camera to work only when reversing, you probably don't connect it to the cigarette lighter. So not so plus is plus. In addition, the point is that if you have a control of burnt bulbs, connecting directly to the reverse lamp does not always work.

Just make a filter on the camera power supply with:
- 2200uF 25V capacitor
- 104pF capacitor
- 2.2k resistor
- 2A diode

Tested on a Peugeot 208 from 2013 with a similar case. Attached is a photo and diagram.

Yes, Mr. Piotr, if you have Control light, it will show that the bulb is burnt out.
You have to think about it 🥰

skopek wrote:

Just make a filter on the camera power supply with:
- 2200uF 25V capacitor
- 104pF capacitor
- 2.2k resistor
- 2A diode
Tested on a Peugeot 208 from 2013 with a similar case. Attached is a photo and diagram.

I would give 105pF
The electrical installation in cars is made for the designed receivers, i.e. lamps, engines, actuators. And not for sensitive audio and video signals. So, the camera ground should always come DIRECTLY from the radio (not from the bulbs or bodywork) and the power supply can come directly from the bulb (but not LED PWM), but it should be filtered using the signal ground from the radio. If someone doesn`t really understand what`s going on, take +12V from the radio connector. The camera can work all the time with the ignition on, it will be fine, even better because it won`t fog up. However, from the reversing lights you need to take a control signal informing the radio that the reverse light is on. And there is no point in trying anything else, unless there is also PWM in the power supply for the reverse lamp, it is not known why. But in new cars it is possible.