Hard wiring a dash camera from the mirror feed.

Discussion in 'Motorhome Chat' started by GeriatricWanderer, Sep 28, 2016.

  1. GeriatricWanderer

    GeriatricWanderer Funster

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    I've recently acquired a new, to me, car and am in the process of moving my dash cam to the new car.
    As usual, it's going to be a fiddly job routing the wiring from the camera to dash mounted cigar lighter socket.

    .......... and then I noticed - my "new" car has an ignition powered auto dipping rear view mirror :)

    That seems to be a perfect place to take power for the camera and eliminate all that wire routing.

    Anybody done that successfully?
     
  2. manda3000gt

    manda3000gt Funster

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    Is it permanently live ? If the car is fairly new it may operate on a Canbus wiring system so may not be a full 12v
     
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  3. pappajohn

    pappajohn Funster Life Member

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    Agreed.
    I was going to use the mirror supply on my Chrysler but information on the Chrysler owners forum stated it was a much lower voltage....from memory 8v.
    You'll need to put a meter on to check first.
     
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  4. GeriatricWanderer

    GeriatricWanderer Funster

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    No, it's not permanently live. It has an on/off switch but once the switch is switched on it remains in the on postion and becomes live when the ignition is switched back on. Not necessary to keep switching back on.
    The car is 2006 vintage Toyota Rav4.
     
  5. Steve N Tracy

    Steve N Tracy Funster

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    Both the dash cams I have are powered by USB so require a 5 volt supply, so are you wiring in some sort of voltage regulator?
     
  6. GeriatricWanderer

    GeriatricWanderer Funster

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    I hadn't got that far. The camera is a bog standard dash cam and has been running straight off the 12v cigar lighter supply of my other car for the last 2 years. If I can't take a lead off the mirror feed then I'll just go back to burying the wire in and around the dash.
     
  7. GeriatricWanderer

    GeriatricWanderer Funster

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    Sorry Steve - I was reading your words but not taking in what you were saying.:(

    Yep, the output coming from the cigar lighter adaptor to the camera is indeed 5v. The supply to the mirror where I'd like to link the camera is 12v so yes, some sort of regulator required.

    Now I suppose I could cobble something from the cigar lighter adaptor, on the other hand, I bet someone here will have a better solution? :)
     
  8. coffeeroffey

    coffeeroffey Funster

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  9. DanielFord

    DanielFord Funster

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  10. PeteH

    PeteH Funster

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    It all depends, If you are handy with a solder iron?. Many years back, I dismantled a "Cigar Lighter" car adapter. Soldered a Live and Negative wire to the Board, put a line fuse (1amp) in the Live feed and used it to charge my "ANALOGUE" Mobile! in the Caravan. so it can be done!. I suspect that it still lies somewhere in my "box of bits"!!.

    The car is 2006 vintage Toyota Rav4. Possibly canbus?. best to check.

    Pete
     
  11. Steve N Tracy

    Steve N Tracy Funster

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    Can bus wires only generally carry a signal to tell something to switch on and off and provide feed back to the ECU they do not carry the 12 volt feed, can signal wires are normally 2 wires twisted together so fairly easy to identify.
     
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  12. GeriatricWanderer

    GeriatricWanderer Funster

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    The two mirror feed wires are separately sleeved and show 12v. I have a little regulator on order.

    Thanks for all the help guys.
     
  13. Lenny HB

    Lenny HB Funster

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    In the Motorhome I used one of the 3 quid eBay USB supplies fitted under the dash wired to the igniton switched radio feed.
     
  14. GeriatricWanderer

    GeriatricWanderer Funster

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    OK, I have the wiring plan sorted, now to pick a replacement sat nav - the original one hangs too low on the screen and anyway, I want something a big better and I have a short list.
    I've been using sat navs for a good number of years but have only ever had ones with screens. I have never used them to replayed any video but I do find a screen "necessary" to check that the camera is pointing in the right direction (it helps). Adjustable mounts do loosen sometimes.

    With the restricted amount of space I have on this new vehicle it looks likely that I'll be going for a camera without a screen and possibly adhesive mounted too.

    My question is - in general - if you have a screenless camera how do you check it's aimed correctly without running some video on another device?

    I'm not looking for any recommendations for particular dash cams - just "how do you do it?"



    ps - I'm not into smart phones or the like so using a wifi connection to the camera is not an option for me.
     
    Last edited: Sep 30, 2016
  15. Autowbars

    Autowbars Funster

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    No need for a regulator, dismantle cigarette type plug, if required a reducer built in, that is why some plugs are a bit bulky, cut feed wires to reducer from the plug.
    Wrap up WELL reducer already in the plug in insulation tape.
    Make connections to your ignition switched supply, and your done.
     
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  16. GeriatricWanderer

    GeriatricWanderer Funster

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    All sorted (my posting of Sept 30 made some references to sat navs, that's because I'm a plonker).

    My new dash camera, Mobius 1080, is up and running. Wired into the 12v mirror feed through a tiny DC converter. Neatly tucked behind the mirror and almost invisible from the driver's seat. No wires trailing anywhere. Well pleased. Nice little camera.
    Now for my next task - where on earth can I find space for a second battery in an already full campervan? I think my only chance is a couple of 2" sky hooks. :)
     
  17. PeteH

    PeteH Funster

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    Got any Space Under the floor of the Wardrobe?. That where my second one went, in a closed box with a vent through the floor.

    Pete
     
  18. Geo

    Geo Trader - Funster

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    HSE Warning Use only metric 50mm Sky hooks for lead acid batteries as per EU Directive 363635/65
    G
    PS I just happen to have two for sale;)
     
  19. GeriatricWanderer

    GeriatricWanderer Funster

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    Wardrobe? What's that?
    I do "real" motorhoming - in a campervan! No such luxuries as wardrobes.
    I've had some experience with gin palaces but found their equipment and fittings became more important than the journey and destination.
     
  20. GeriatricWanderer

    GeriatricWanderer Funster

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    I can't be doing with all that EU metric malarkey but I guess I should go for 3" rather than 2" - those batteries are quite weighty.
     
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