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[Solved] Installation of an additional cigarette lighter socket - AUDI A4 B6

mjar755 19158 12
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  • #1 17334499
    mjar755
    Level 10  
    Posts: 69
    Rate: 8
    Hello,
    I have a question, I plan to install an additional cigarette lighter socket in the audi a4 b6 sedan.
    The car has only one socket (with a fuse in the 15A box).

    How can I connect an additional socket? Can I easily plug in the installation with the current lighter, or is it better to pull a new cable from the battery?

    I am thinking of one or two additional sockets so that I can connect a fridge, webcam and possibly a phone charger.

    Regards [/ TD]
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  • #2 17334510
    DriverMSG
    VIP Meritorious for electroda.pl  
    Posts: 44094
    Help: 3984
    Rate: 4836
    mjar755 wrote:
    that I could connect a fridge, webcam and possibly a phone charger.
    The camera and charger are max 5A, and how much does this fridge have?
  • #3 17334528
    mjar755
    Level 10  
    Posts: 69
    Rate: 8
    DC 12V power supply: 46W cooling, 42W heating

    It says so, that's about 3.8A. Theoretically. I count as well.

    But I do not rule out connecting other things. I am definitely thinking about the nest because of the fridge.

    Added after 2 [minutes]:

    Generally, I recently connected a fridge and a webcam to the splitter. The fuse went off and the end of the branch flared up in the lighter socket

    That is why I wonder if it can be under one.

    The splitter was probably too weak, but I wouldn't have any adventure anyway.

    Added after 9 [minutes]:

    I was thinking about installing something like this: https://allegro.pl/gocketo-zapalniczki-hermetyczne-12-24v-15a-pls35a-i7439915592.html
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  • #4 17335050
    Covul
    Level 18  
    Posts: 192
    Help: 29
    Rate: 49
    If the socket did not make it to you, insert the second one, just remember about the fuse and the appropriate cross-section of the wires.
  • #5 17335081
    mjar755
    Level 10  
    Posts: 69
    Rate: 8
    Covul wrote:
    If the socket did not make it to you, insert the second one, just remember about the fuse and the appropriate cross-section of the wires.


    It didn't work out, but as I said, I had a 3-way splitter not from some higher shelf, which is probably why.

    I mean more if I can connect to this socket and make a second or maybe some suggestions on what to connect to make another socket
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  • Helpful post
    #6 17335213
    Covul
    Level 18  
    Posts: 192
    Help: 29
    Rate: 49
    Make the second one on a separate line, on a well-known auction site on a, a LMST sells "Bypas Mini fuse" or "Bypas flat fuse Uni". Choose the one that will fit your fuses, plug in the box where the fuse was from the socket and you have branched, although the seller does not write anything about the cross-section of the cable of this miracle, or about what current it can be charged. Alternatively, fasten directly to the clamp (there are those with a place for branching and fuse) and pull the cord where you want the socket, more fun, but probably more confident.
  • #7 17335932
    mjar755
    Level 10  
    Posts: 69
    Rate: 8
    Covul wrote:
    Make the second one on a separate line, on a well-known auction site on a, a LMST sells "Bypas Mini fuse" or "Bypas flat fuse Uni". Choose the one that will fit your fuses, plug in the box where the fuse was from the socket and you have branched, although the seller does not write anything about the cross-section of the cable of this miracle, or about what current it can be charged. Alternatively, fasten directly to the clamp (there are those with a place for branching and fuse) and pull the cord where you want the socket, more fun, but probably more confident.


    Dammit, I didn't know it was even like that. So I plug it in place of the current fuse, plug in the plus (this cable from Baypas) from this to the new lighter, minus the catch from the mass anywhere the body to catch and that's it?
    Do i understand

    Added after 1 [minutes]:

    possibly also a switch (switch) in front of the socket, that I could turn them on and off as if I had not used

    Added after 14 [minutes]:

    And I have a question, what fuses to connect there then? the original was 15A, i.e. 2 15A fuses?
  • Helpful post
    #8 17335964
    Covul
    Level 18  
    Posts: 192
    Help: 29
    Rate: 49
    Until you raised the subject, I also didn't know that such miracles exist :) . You understand well, I looked at the sellers of the invention looking for load capacity, one wrote that up to 30A but it is possible that it is a value for both lines together, in total the fuses are also rather larger so I would give 15A for each and it should be ok for me I also have 15A per socket in the car. As for the switch, you can look for which of the fuses is only after switching on the ignition and plug in there. You can try to find the mass on one of the screws, put an eye on the cable, under the screw and hey banana.
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  • #9 17336018
    mjar755
    Level 10  
    Posts: 69
    Rate: 8
    Will the 1.0mm2 cable (because it is in baypas) good for connecting the power supply to the new lighter? Is not too thin?
  • Helpful post
    #10 17336027
    Covul
    Level 18  
    Posts: 192
    Help: 29
    Rate: 49
    I found a bypass with 2.5mm2 but according to the calculator for 15A and 1m cable it should be ok at 1mm2.
  • #11 17336033
    mjar755
    Level 10  
    Posts: 69
    Rate: 8
    The user of LMST is just 1mm2,
    And here is the question whether it will be ok to connect the second socket and on the same cable.
  • #12 17349574
    mjar755
    Level 10  
    Posts: 69
    Rate: 8
    The whole mounted. Thanks so much for your help and advice. To close :)
  • #13 17349577
    mjar755
    Level 10  
    Posts: 69
    Rate: 8
    The whole mounted. Thanks so much for your help and advice. To close :)

    Added after 47 [seconds]:

    The whole hula as it should be.
    To close
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Topic summary

✨ The discussion revolves around the installation of an additional cigarette lighter socket in an Audi A4 B6 sedan, which originally has only one socket. The user seeks advice on whether to connect the new socket to the existing one or to run a new cable from the battery. Concerns about power consumption arise, particularly regarding a fridge, webcam, and phone charger. Responses suggest that connecting a second socket on a separate line is advisable, with recommendations for using appropriate fuses and wire gauge. A "Bypas Mini fuse" or similar device is mentioned for branching off the existing fuse. The user successfully completes the installation, confirming that the setup works as intended.
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FAQ

TL;DR: For Audi A4 B6, use 15A per socket; "I would give 15A for each." Add a separate fused line via fuse‑tap or battery feed. [Elektroda, Covul, post #17335964]

Why it matters: This helps Audi A4 B6 owners add extra 12V sockets safely for fridges, dashcams, and chargers without blown fuses or melted splitters.

Quick Facts

Can I piggyback off the existing socket or run a new line?

Run a separate, fused feed for each added socket. Use a fuse‑tap in the fuse box, or a fused lead from the battery clamp. That avoids overloading the factory lighter circuit and cheap splitters. “Make the second one on a separate line.” [Elektroda, Covul, post #17335213]

What fuse size should I use for an extra 12V socket?

Use 15A per socket. Treat any “30A” fuse‑tap label as a combined device rating. Protect each branch individually with its own fuse. “I would give 15A for each.” [Elektroda, Covul, post #17335964]

How do I add a second socket with a fuse-tap (bypass)?

  1. Fit a compatible fuse‑tap into a suitable slot in the fuse box.
  2. Install separate fuses for the original circuit and the new branch, matching the per‑socket rating.
  3. Route the positive to the new socket and ground the negative at a solid body point. Test under load. [Elektroda, Covul, post #17335964]

Where should I connect the ground (negative)?

Use a clean chassis ground. Crimp a ring terminal on the negative lead. Loosen a nearby factory screw, clean paint if needed, and refasten firmly. “You can try to find the mass on one of the screws.” Verify low resistance to battery negative. [Elektroda, Covul, post #17335964]

Is 1.0 mm² cable enough for the extra socket?

For about 15A over roughly 1 meter, 1.0 mm² was acceptable in the thread. If available, a 2.5 mm² fuse‑tap gives more headroom. Keep runs short and protected from abrasion and heat sources. [Elektroda, Covul, post #17336027]

Can I power a fridge, dashcam, and phone at once?

Yes, if the total current stays under the socket’s fuse rating. A dashcam plus phone charger is about 5A combined. Check your fridge label and add the currents. Use dedicated, fused sockets instead of a cheap multi‑way splitter. [Elektroda, DriverMSG, post #17334510]

How many amps does a 12V car fridge use?

Example label: 46W cooling and 42W heating. At 12V, that is about 3.8A in cooling mode. Size wire and fuses for continuous draw. Allow margin for startup surges and heat. [Elektroda, mjar755, post #17334528]

Why did my 3‑way splitter blow the fuse or heat up?

The fridge plus camera tripped the fuse, and the splitter’s branch end flared in the socket. Load and poor contacts cause heat in cheap splitters. Replace with dedicated, fused sockets on proper wiring. [Elektroda, mjar755, post #17334528]

Should I add a switch or make the new socket ignition‑switched?

You can add an inline switch before the socket. Easier: choose a fuse slot that is live only with the ignition. That keeps accessories off when parked and protects the battery. [Elektroda, Covul, post #17335964]

Is a direct battery connection better?

A fused feed from the battery clamp is robust. Many clamps accept an add‑on fused branch. Route the cable to the cabin, secure it, and mount your socket. “More fun, but probably more confident.” [Elektroda, Covul, post #17335213]

What socket hardware should I pick?

Use a quality, sealed 12/24V socket rated 15A for automotive use. Mount securely and protect the wiring. The thread considered a hermetic 15A unit for this upgrade. [Elektroda, mjar755, post #17334528]

Can I run two extra sockets from one 1.0 mm² bypass lead?

Keep each outlet on its own fused branch from the fuse‑tap or battery feed. Size each branch for 15A. “I would give 15A for each.” This avoids overloading a small single lead. [Elektroda, Covul, post #17335964]

Did this solution work on an Audi A4 B6?

Yes. The OP installed the second socket and reported success. “The whole hula as it should be.” The thread was then closed. [Elektroda, mjar755, post #17349577]
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