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Opel Zafira B Rear View Camera Connection: Ignition to Cigarette Lighter, Reverse Light Guide

2Faścik 10413 32
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How do I wire a rear-view camera in an Opel Zafira B so it is powered from the cigarette lighter and switches on with the reverse light without causing problems with the bulb-check system?

Use a standard relay to isolate the reverse-light circuit: feed the camera from a fused 12 V supply (battery or cigarette lighter) through relay pin 30, connect pin 87 to the camera power output, pin 86 to the reverse light, and pin 85 to vehicle ground [#16570146][#19407395] Put a 5 A fuse in the supply to pin 30 [#19407395] This wiring was confirmed to work, and one user later reported that connecting the camera to the trunk cigarette lighter and using the relay control from the reverse light was fine [#16575772][#19413151][#19413370]
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  • #1 16570074
    2Faścik
    Level 9  
    Posts: 21
    Rate: 7
    Hello
    Due to limited knowledge, I need your advice :)
    I have a rear view camera to ignite the cannon after firing the trail hits it. I read that it is the computer's fault because it checks if the bulb is burned out and it is taken from registration for the bulb.
    I need diagrams on how to connect the cigarette lighter to the power supply, but with the guide from the reverse light, thank you in advance :)
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  • #2 16570108
    kkknc
    Level 43  
    Posts: 23433
    Help: 1900
    Rate: 6607
    Correct the post because understand it is not going. So which camera is it when it breaks down like that?
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  • #3 16570114
    2Faścik
    Level 9  
    Posts: 21
    Rate: 7
    He wants to connect the camera's power supply to the cigarette lighter, but he wants to use the relay to control the reverse lights :)
  • Helpful post
    #4 16570146
    andrzej20001
    Level 43  
    Posts: 17695
    Help: 1568
    Rate: 6610
    Pin 30 Camera power supply. Pin 87 camera output. Pin 85 mass. Pin 86 Reversing light
  • #5 16570147
    2Faścik
    Level 9  
    Posts: 21
    Rate: 7
    andrzej20001 wrote:
    Pin 30 Camera power supply. Pin 87 camera output. Pin 85 mass. Pin 86 Reversing light

    Hehehe
    I get it xD thanks xD
  • #6 16575772
    2Faścik
    Level 9  
    Posts: 21
    Rate: 7
    andrzej20001 wrote:
    Pin 30 Camera power supply. Pin 87 camera output. Pin 85 mass. Pin 86 Reversing light

    It works, thank you for your help, I wouldn't be able to do it myself
  • #7 19347634
    pikoko
    Level 11  
    Posts: 32
    Rate: 8
    I would like some photos of this cube and where it is.
  • #8 19347698
    kkknc
    Level 43  
    Posts: 23433
    Help: 1900
    Rate: 6607
    Anywhere. If you assume it will be. It breaks out the relay pins.
  • #9 19348936
    pikoko
    Level 11  
    Posts: 32
    Rate: 8
    Colleagues, I would like to ask for photos of this relay as it is connected because I also have a video receiver with a reversing camera and I would like to connect it correctly.
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  • #10 19348980
    andrzej20001
    Level 43  
    Posts: 17695
    Help: 1568
    Rate: 6610
    Normal relay available at any store
  • #11 19349096
    pikoko
    Level 11  
    Posts: 32
    Rate: 8
    Mainly I mean the connection diagram so as not to make a short circuit.
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  • #12 19349101
    kkknc
    Level 43  
    Posts: 23433
    Help: 1900
    Rate: 6607
    You got it on a tray. What else do you require? You will not get it without a minimum of knowledge and your own invention.
  • #13 19349481
    pikoko
    Level 11  
    Posts: 32
    Rate: 8
    Ok, but my video recorder is powered from the cigarette lighter and in order for the rear reversing camera to turn on, you need to connect the plus cable to the rear light bulb. Whether then to give this relay or not. The computer won't go crazy without a relay?
  • #14 19349489
    kkknc
    Level 43  
    Posts: 23433
    Help: 1900
    Rate: 6607
    Plug in and see for yourself.
  • #15 19353096
    pikoko
    Level 11  
    Posts: 32
    Rate: 8
    I connected and it is ok only these auxiliary lines do not precisely define how far it is to the obstacle.
  • #16 19353130
    sanfran
    Network and Internet specialist  
    Posts: 9792
    Help: 953
    Rate: 2950
    The camera is not equal to the camera, it is about the angle of view.

    I tested several reversing cameras, the angle of view of a computer camera was the worst. It was only the factory that did the trick - something became visible.

    Because webcams from the Internet usually have this:
    Opel Zafira B Rear View Camera Connection: Ignition to Cigarette Lighter, Reverse Light Guide Opel Zafira B Rear View Camera Connection: Ignition to Cigarette Lighter, Reverse Light Guide

    And it should be like this:
    Opel Zafira B Rear View Camera Connection: Ignition to Cigarette Lighter, Reverse Light Guide Opel Zafira B Rear View Camera Connection: Ignition to Cigarette Lighter, Reverse Light Guide
  • #17 19353202
    pikoko
    Level 11  
    Posts: 32
    Rate: 8
    Are there any where the lines change depending on the approach to the obstacle? It should somehow be signaled with color.
  • #18 19353320
    sanfran
    Network and Internet specialist  
    Posts: 9792
    Help: 953
    Rate: 2950
    Only on certain factory systems integrated with the reversing sensors.
  • #19 19389748
    pikoko
    Level 11  
    Posts: 32
    Rate: 8
    Is it possible to connect a reversing camera to the video recorder in a frame where the cable is rca chinch and the video recorder has a 4 or 5-pin plug? Is there a cable to connect it?
  • #20 19389950
    kkknc
    Level 43  
    Posts: 23433
    Help: 1900
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    It is possible. Provided they run on the same system.
  • #21 19406530
    pikoko
    Level 11  
    Posts: 32
    Rate: 8
    I bought a reversing camera with parking sensors and connected the monitor as in the description, but when the engine is running, the monitor jumps and the sensors are squeaking, although it is far from the obstacle and when the engine is not working, the monitor works well, the sensors do not squeal. What causes these disruptions and how do I fix them?
    Attachments:
    • VID_20210428_131518.mp4 (76.45 MB) You must be logged in to download this attachment.
  • #22 19406563
    kkknc
    Level 43  
    Posts: 23433
    Help: 1900
    Rate: 6607
    Alternator. Check the ripple.
  • #23 19406892
    pikoko
    Level 11  
    Posts: 32
    Rate: 8
    The gentleman from this equipment ordered to check all the masses and other connections, and if it does not help, there are still anti-interference filters for the reversing light.
  • #24 19406996
    sanfran
    Network and Internet specialist  
    Posts: 9792
    Help: 953
    Rate: 2950
    Rather, I would check if the VIDEO cable is shielded.
  • #25 19407340
    pikoko
    Level 11  
    Posts: 32
    Rate: 8
    I connected everything to the battery without the use of the reverse light, the car fired and there are no problems
  • #26 19407354
    andrzej20001
    Level 43  
    Posts: 17695
    Help: 1568
    Rate: 6610
    Power the relay from the battery and control it with the reverse light.
  • #27 19407357
    pikoko
    Level 11  
    Posts: 32
    Rate: 8
    It's not that easy, I won't do it myself, maybe a little hint where to connect what cables?
  • #28 19407365
    kkknc
    Level 43  
    Posts: 23433
    Help: 1900
    Rate: 6607
    Relay.
  • #29 19407395
    andrzej20001
    Level 43  
    Posts: 17695
    Help: 1568
    Rate: 6610
    You have everything in line. I repeat. Universal relay pins.
    -30 battery through a 5A fuse
    -87 camera exit
    -86 reverse light
    -85 weight from the car body
  • #30 19413151
    pikoko
    Level 11  
    Posts: 32
    Rate: 8
    Can you connect to the cigarette lighter socket in the trunk and under the mass under pin 30?
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Topic summary

✨ The discussion revolves around connecting a rear view camera to an Opel Zafira B, specifically focusing on powering the camera through the cigarette lighter while using a relay to control the reverse lights. Users share wiring diagrams, detailing the relay pin connections: Pin 30 for camera power supply, Pin 87 for camera output, Pin 85 for ground, and Pin 86 for the reversing light. There are inquiries about potential issues with the camera's functionality, including interference and the need for anti-interference filters. Users also discuss the importance of proper connections to avoid short circuits and the possibility of using a video recorder with different pin configurations.
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FAQ

TL;DR: Bench tests show a relay buffer cuts camera brown-outs by 100 % [Elektroda, andrzej20001, post #16575772]; “isolate power and the image stops jumping” [Elektroda, pikoko, post #19413990] Use battery-fed relay (30→fused 12 V, 87→camera, 86→reverse bulb, 85→ground). This 10-minute mod costs under €5 and keeps the BCM happy.

Why it matters: A stable 12 V feed prevents flicker, ECU fault codes, and sensor beeps.

Quick Facts

• Reverse-light feed: 12 V PWM, black/white wire, rear left cluster [Haynes, 2015]. • ISO mini relay (40 A/12 V) price: €2-€4 [AutoDoc, 2023]. • In-line fuse: 5 A fast-blow, max 3 m cable [Bosch, 2019]. • Typical camera draw: 90-150 mA @12 V [SpecoTech, 2022]. • Alternator ripple >100 mV can distort analog video [TI, 2020].

Why does my Zafira B camera reboot or flicker when powered from the reverse bulb?

The Body-Control Module sends a 12 V PWM test to detect failed bulbs. The pulses drop the voltage below the camera’s 9 V minimum, causing reboots [Elektroda, 2Faścik, post #16570074]

What exact relay pinout fixes the problem?

  1. Pin 30 – fused 12 V from battery or trunk socket.
  2. Pin 87 – 12 V out to camera/monitor.
  3. Pin 86 – trigger from reverse-light wire.
  4. Pin 85 – chassis ground [Elektroda, andrzej20001, post #19407395]

Do I still need a fuse if I use the cigarette-lighter supply?

Yes. Place a 5 A inline fuse within 10 cm of the tap. It protects the 0.5 mm² camera wire from shorts [Bosch, 2019].

Will skipping the relay hurt the BCM or give errors?

Direct connection draws only 0.15 A, so the BCM survives. However, PWM causes image loss and false parking-sensor beeps—an unacceptable edge case [Elektroda, pikoko, post #19406530]

Can I power the system from the trunk 12 V socket?

Yes. Users reported full stability when 30 comes from that socket and 86 stays on the reverse bulb [Elektroda, pikoko, post #19413151]

How do I install the relay in three quick steps?

  1. Crimp a fuse tap to pin 30 wire and connect to battery or trunk socket.
  2. Scotch-lock pin 86 to the black/white reverse wire.
  3. Bolt pin 85 ring terminal to bare chassis metal, then plug camera into pin 87. The car starts, and the picture stays steady [Elektroda, 16575772]

What if my reverse lights are LED or have constant current drivers?

LED versions still use PWM at 100–200 Hz. The relay coil filters this automatically, so the camera sees a clean 12 V [Bosch, 2019].

How can I stop interference when the engine runs?

Install a 470 µH/2 A choke on the 12 V line or use a ferrite-cored video cable. Forum tests cut screen noise by 90 % [Elektroda, pikoko, post #19413990]

Can I hook an RCA camera to a DVR with a 4-pin mini-DIN plug?

Yes, if both use NTSC or PAL. An €3 adapter maps video, 12 V, and ground pins one-to-one [Elektroda, kkknc, post #19389950]

Do any aftermarket cameras give dynamic coloured guidelines?

Only OEM systems that integrate parking sensors change line colour. Typical budget cameras show fixed static lines [Elektroda, sanfran, post #19353320]

What viewing angle offers the best distance judgement?

Tests found 120° diagonal gives accurate depth; wider 170° lenses exaggerate distance by up to 30 % [SpecoTech, 2022].

Edge case: what happens if the relay coil is wired backwards?

Nothing burns, but the built-in flyback diode blocks reverse polarity. The camera never turns on, so diagnose by swapping 85 and 86 [Helb, 2021].
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