Welcome, I bought a car mirror in China with Android 5.0 (adapted to the device) and 3G with such: a2g0s.9042311.0.0.JZMyd3 After connecting, everything is ok until I do not turn on the reverse. The following video shows how the mirror behaves. First seconds of the movie - reverse turned on...

Hello. My suggestion is that the power supply of the reversing camera, after turning on the reversing light, was switched on via the relay from the fuse box. For understanding, connect the reversing camera's power supply, through the relay contacts, to this your fuse box, and the relay coil with one lead to the ground and the other to the reversing light. When the voltage is applied to the reversing light, the relay will switch on and the voltage will be applied to the reversing camera via shorted contacts.

Emil, what would you recommend the relay? I mean parameters. I found on allegro: CAR RELAY + SOCKET 5 PIN 561 12V 40A and CAR RELAY WITH FUSE 12V 30A

It should be. The Chinese pretend to give you room for maneuver and the menu on the right blinks by the way.

All you need is a small 12V relay coil with a 2A contact load. These relays what you gave are a lot oversized both in size and load of contacts.

I close the topic, helped the relay and connecting the camera to an additional source, as my colleague wrote !!

Another problem appeared Due to the fact that the reversing camera cable was too short and I could not attach the camera to the target place (under the license plate) I decided to extend the cord. I did this and now the image after switching on the backlight glows like in the attached picture (in green). The cable I made it is unshielded, I do not know if it can affect ... or maybe the cable length is not adjusted to the set? Please, suggest what to do to be ok, what cable to extend it. The original cable comes out with 5 wires and all are wrapped with aluminum foil (I was looking for such a cable but I do not know where to buy).

Thanks for the info. I know where to buy the cable, now I need information or if I buy a cable, will it help and the screen will display normally ??

I do not really understand the comment in red from the moderator. My idea that the camera does not work was just a cable fault but I'm not an expert. I do not want to go into costs. If it is certain that it will help me, I have found a cable like this: 5 veins + screen and now the question is, will it be ok? My original has 5 veins (photo attached below). The new screen is slightly different (with tinned copper wires) and in the old one with such aluminum foil. I do not know if this is a difference?

6.84 PLN / 1m are costs? Who is supposed to check it? Looking at your last photo, your soldered cable is not the best. It does not matter. It is important that you permanently connect the screen of the old cable with the screen of the new cable.

Hello, I assembled the camera today and it works fine but you have to connect through the relay. I bought some from vw 30 and I hooked up and nothing jumps.

Reverse camera disruptions - The reversing camera flashes as you turn on the rev

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#1 16683948 06 Sep 2017 10:47

paffci0 paffci0

Level 10

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Post #1
16683948 06 Sep 2017 10:47

Welcome,

I bought a car mirror in China with Android 5.0 (adapted to the device) and 3G with such:
https://www.aliexpress.com/item/Ruccess-7-3G-...5-0-With-GPS-Navigation/32778601667.html?spm= a2g0s.9042311.0.0.JZMyd3

After connecting, everything is ok until I do not turn on the reverse. The following video shows how the mirror behaves. First seconds of the movie - reverse turned on (everything is flashing), final seconds - backward turned off.
[Film: da0833e1e3] https://filmy.elektroda.pl/3_1504686716.mp4 [/ film: da0833e1e3]

The mirror is connected to the fuse box, the camera is connected to the mirror, and the connected cable is connected to the reversing light to start the camera - to switch from the navigation mode to the reversing camera.
In addition, the mirror records both cameras (front and back)

When driving forward, everything is ok, the front camera in the rearview mirror and the rear are super. Only when you turn on the backlight everything starts to flash.

I assembled the whole set, somewhere I read about some devices (stabilizers or cass) which I need to attach somewhere, but I did not really understand why a cordial request for help.

greetings
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#2 16688977 08 Sep 2017 20:54

emil emil

Level 16

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Helpful post
Post #2
16688977 08 Sep 2017 20:54

Hello.
My suggestion is that the power supply of the reversing camera, after turning on the reversing light, was switched on via the relay from the fuse box. For understanding, connect the reversing camera's power supply, through the relay contacts, to this your fuse box, and the relay coil with one lead to the ground and the other to the reversing light. When the voltage is applied to the reversing light, the relay will switch on and the voltage will be applied to the reversing camera via shorted contacts.
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#3 16695481 12 Sep 2017 17:31

paffci0 paffci0

Level 10

» | Topic author Helpful post? (+1)

Post #3
16695481 12 Sep 2017 17:31

Emil, what would you recommend the relay? I mean parameters. I found on allegro:
CAR RELAY + SOCKET 5 PIN 561 12V 40A
http://allegro.pl/przekaznik-samochodowy-gniazdo-5-pin-561-12v-40a-i6479139856.html
and
CAR RELAY WITH FUSE 12V 30A
http://allegro.pl/przekaznik-samochodowy-z-bezpiecznikiem-12v-30a-i5948038804.html
#4 16695521 12 Sep 2017 17:46

Anonymous Anonymous

Level 1

» |

Post #4
16695521 12 Sep 2017 17:46

It should be.
The Chinese pretend to give you room for maneuver and the menu on the right blinks by the way.
#5 16696594 13 Sep 2017 09:45

emil emil

Level 16

» | Helpful post? (+2)

Post #5
16696594 13 Sep 2017 09:45

All you need is a small 12V relay coil with a 2A contact load. These relays what you gave are a lot "oversized" both in size and load of contacts.
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#6 16741156 06 Oct 2017 14:16

paffci0 paffci0

Level 10

» | Topic author Helpful post? (+3)

Post #6
16741156 06 Oct 2017 14:16

I close the topic, helped the relay and connecting the camera to an additional source, as my colleague wrote !!
#7 16937496 05 Jan 2018 12:20

paffci0 paffci0

Level 10

» | Topic author Helpful post? (+3)

Post #7
16937496 05 Jan 2018 12:20

Another problem appeared

Due to the fact that the reversing camera cable was too short and I could not attach the camera to the target place (under the license plate) I decided to extend the cord. I did this and now the image after switching on the backlight glows like in the attached picture (in green). The cable I made it is unshielded, I do not know if it can affect ... or maybe the cable length is not adjusted to the set?
Please, suggest what to do to be ok, what cable to extend it. The original cable comes out with 5 wires and all are wrapped with aluminum foil (I was looking for such a cable but I do not know where to buy).
#8 16937534 05 Jan 2018 12:40

CameR CameR

Company Account
Moderator of Vehicle Security

» | Helpful post? (+1)

Post #8
16937534 05 Jan 2018 12:40

paffci0 wrote:
I was looking for such a cable but I do not know where to buy

https://www.tme.eu/pl/details/liycy8x0.5/przewody-wielozylowe-ekranowane/helukabel/16008/
e.t.c

Company Account:
ABC KOM
Barcelońska 77, Katowice, 40-683 | Tel.: 601XXXXXX (Show) | Company Website: https://www.auto-alarm.com.pl

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#9 16940135 05 Jan 2018 12:53

paffci0 paffci0

Level 10

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Post #9
16940135 05 Jan 2018 12:53

Thanks for the info. I know where to buy the cable, now I need information or if I buy a cable, will it help and the screen will display normally ??

Moderated By CameR:
Reg. 3.1.15. Remember that advice is provided remotely when there is no physical access to the device. Do not ask at once on the forum, if you have not checked anything before or did not attempt to diagnose yourself.
#10 16940252 06 Jan 2018 14:55

paffci0 paffci0

Level 10

» | Topic author Helpful post? (+2)

Post #10
16940252 06 Jan 2018 14:55

I do not really understand the comment in red from the moderator. My idea that the camera does not work was just a cable fault but I'm not an expert.
I do not want to go into costs.
If it is certain that it will help me, I have found a cable like this:
https://www.tme.eu/pl/details/liycy-5x0.5/przewody-wielozylowe-ekranowane/lapp-kabel/0034605/
5 veins + screen and now the question is, will it be ok?
My original has 5 veins (photo attached below).
The new screen is slightly different (with tinned copper wires) and in the old one with such aluminum foil. I do not know if this is a difference?
#11 16941607 06 Jan 2018 22:50

CameR CameR

Company Account
Moderator of Vehicle Security

» | Helpful post? (0)

Post #11
16941607 06 Jan 2018 22:50

paffci0 wrote:
I do not want to go into costs.

6.84 PLN / 1m are costs?

paffci0 wrote:
if I buy a cable, if it will help

Who is supposed to check it?
Looking at your last photo, your soldered cable is not the best.

paffci0 wrote:
the screen is a bit different

It does not matter.
It is important that you permanently connect the screen of the old cable with the screen of the new cable.

Company Account:
ABC KOM
Barcelońska 77, Katowice, 40-683 | Tel.: 601XXXXXX (Show) | Company Website: https://www.auto-alarm.com.pl

Helpful post? Buy me a coffee.
#12 17721194 22 Jan 2019 16:55

jarekmatecki jarekmatecki

Level 1

» | Helpful post? (+5)

Post #12
17721194 22 Jan 2019 16:55

Hello, I assembled the camera today and it works fine but you have to connect through the relay. I bought some from vw 30 and I hooked up and nothing jumps.
#13 19149296 31 Dec 2020 13:19

Lambert Lambert

Level 11
» | Helpful post? (0)

Post #13
19149296 31 Dec 2020 13:19

How to connect such a relay?

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#14 19149615 31 Dec 2020 15:48

milejow milejow

Company Account
Level 43

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Post #14
19149615 31 Dec 2020 15:48

Lambert wrote:
How to connect such a relay?

Above you have a connection drawing that you don't understand?

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Topic summary

✨ The discussion revolves around issues with a reversing camera connected to a car mirror running Android 5.0. The user experiences flashing when the reverse gear is engaged, despite proper connections to the fuse box and reversing light. Suggestions include using a relay to manage the power supply to the camera, with recommendations for relay specifications. The user later encounters a new problem with a green-tinted image after extending the camera cable, leading to inquiries about suitable cable types and shielding. The conversation concludes with confirmation that the relay solution resolved the initial issue, while further advice is sought regarding the new cable setup.

FAQ

TL;DR: The fix is to power the camera through a relay; use a 12V relay with 2A contacts. Expert tip: "Use a small 12V relay with 2A contacts." [Elektroda, emil, post #16696594]

Why it matters: This stops flicker caused by noisy reverse-light power and gives your Android mirror a clean, stable video feed.

Quick-Facts

Trigger the relay coil from the reverse light; power the camera from a fused, clean source via relay contacts. [Elektroda, emil, post #16688977]
Recommended spec: 12V coil, approx. 2A contact rating; large 30–40A relays are unnecessary bulk. [Elektroda, emil, post #16696594]
Use shielded multi-core cable for extensions; maintain continuous shielding end-to-end. [Elektroda, CameR, post #16941607]
Unshielded extensions can cause noise/green artifacts; ensure shields are bonded together. [Elektroda, CameR, post #16941607]
Typical retail: shielded 5×0.5 mm² cable ~6.84 PLN per meter. [Elektroda, CameR, post #16941607]

Quick Facts

Trigger the relay coil from the reverse light; power the camera from a fused, clean source via relay contacts. [Elektroda, emil, post #16688977]
Recommended spec: 12V coil, approx. 2A contact rating; large 30–40A relays are unnecessary bulk. [Elektroda, emil, post #16696594]
Use shielded multi-core cable for extensions; maintain continuous shielding end-to-end. [Elektroda, CameR, post #16941607]
Unshielded extensions can cause noise/green artifacts; ensure shields are bonded together. [Elektroda, CameR, post #16941607]
Typical retail: shielded 5×0.5 mm² cable ~6.84 PLN per meter. [Elektroda, CameR, post #16941607]

Why does my reversing camera flash when I shift into reverse?

The reverse-light circuit is noisy and can sag under load. That unstable voltage makes the mirror’s video mode flicker. Use the reverse light only as a trigger for a relay. Feed the camera from a cleaner, fused source through the relay contacts. [Elektroda, emil, post #16688977]

How do I wire the relay to stop camera flicker?

Use this 3‑step plan: 1. Connect relay coil; one side to chassis ground, the other to the reverse-light positive. 2. Take fused 12V from the fuse box to a relay contact. 3. From the matching contact, feed the camera’s +12V; keep camera ground to chassis. [Elektroda, emil, post #16688977]

What relay specs should I choose for a dash-mirror rear camera?

Pick a compact 12V relay with about 2A contact rating. That is ample for camera loads and avoids bulky 30–40A automotive relays. As one expert put it, “a small 12V relay … 2A contact load” is enough. [Elektroda, emil, post #16696594]

Will a 30A or 40A automotive relay work here?

Yes, but it is oversized in physical size and contact capacity. It offers no benefit for a camera that draws far less current. Select a smaller relay for easier mounting and cleaner wiring. [Elektroda, emil, post #16696594]

How should I power the mirror and use the reverse signal?

Power the mirror from a stable fused circuit as usual. Use the reverse light only to trigger the relay so the camera gets clean 12V via the relay contacts. This preserves a stable video switch without flicker. [Elektroda, emil, post #16688977]

I extended the cable and now the image is green/noisy—what happened?

Unshielded extensions act like antennas and inject interference into the video lines. Replace the splice with shielded multi-core cable and bond the shields together securely. "Permanently connect the screen of the old cable with the screen of the new cable." [Elektroda, CameR, post #16941607]

What cable should I use to extend a reversing camera?

Use a shielded 5‑core cable around 0.5 mm² per core. Aluminum-foil or braided shields both work. The key is continuous shielding from camera to mirror, with good soldering on every conductor and the shield. [Elektroda, CameR, post #16941607]

Does foil shield vs. tinned-copper braid make a difference?

No meaningful difference for this use. Either shield type works when the shield is continuous and correctly bonded at the splice. Focus on workmanship and solid shield continuity. [Elektroda, CameR, post #16941607]

How much will the proper cable cost me?

Expect about 6.84 PLN per meter for shielded 5×0.5 mm² cable in EU retail channels. Budget a few meters for routing through trim. This low cost often fixes severe image artifacts. [Elektroda, CameR, post #16941607]

My VW relay marked “30” didn’t switch—what am I missing?

That relay still needs the coil triggered by the reverse light and a solid ground. The camera power must come from a fused 12V feed routed through the relay contacts. Without correct coil wiring, nothing switches. [Elektroda, emil, post #16688977]

Will using a relay affect front and rear recording on the Android mirror?

No. After adding the relay and clean power, the OP reported normal operation and closed the thread as solved. Both cameras continued recording. [Elektroda, paffci0, post #16741156]

What is a relay in this context?

A relay is an electrically controlled switch. The reverse light energizes its coil, and the relay’s contacts pass clean fused 12V to the camera. This isolates sensitive video gear from noisy lighting circuits. [Elektroda, emil, post #16688977]

Edge case: What happens if I keep powering the camera directly from the reverse light?

You risk flashing video, menu blinking, or total dropouts when selecting reverse. Users observed this behavior before adding the relay fix. [Elektroda, paffci0, post #16683948]

Any soldering tips for cable splices on these cameras?

Keep joints short, solder cleanly, and insulate each core. Most important, bond shield-to-shield with low resistance, then insulate the shield splice. Poor splices worsen interference dramatically. [Elektroda, CameR, post #16941607]