Does the EHU override the 12v in the front?

Discussion in 'Tech/Mech General' started by wavester, Jul 19, 2009.

  1. wavester

    wavester

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    Just packing up for a trip to The Tour de France and Languedoc. When i am hooked up to the mains, does that override the 12v in the cab ie cigarette lighter as i want to power a 12v cool box from there?
     
  2. pappajohn

    pappajohn Funster Life Member

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    normally the dashboard fag lighter socket will be powered from the engine battery, normally independant of the ingnition switch...ie..on all the time,
    and independant of the hookup.

    if you mean connecting the coolbox to the dash socket when you arent running the engine then dont do it....12v coolboxs take a lot of power and the engine battery will be flat in a very short time:Sad:
     
  3. Geo

    Geo Trader - Funster

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    Not normally if its the cab factory fitted one
    Theres only one way to find out:RollEyes:
    Geo
     
  4. Venita

    Venita

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    12v

    I think you will find that your 12v in the cab will only work when the engine is running. It wont be over-ridden by the hook up. Have fun
     
  5. Road Runner

    Road Runner

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    Last edited: Jul 19, 2009
  6. pappajohn

    pappajohn Funster Life Member

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    got to dis-agree there.:RollEyes:
    the majority will have been altered by the m/h converter to be 'on' all the time. ie...bypassed the ignition switch.
    and yes....ehu will have no effect.
     
  7. pappajohn

    pappajohn Funster Life Member

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    or even cheaper.....plug it into a 12v socket in the hab area.
    use a 2 pin plug to fag lighter socket adaptor if needed.
     
  8. Venita

    Venita

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    12v

    I think it depends on the type of motorhome. Ours doesnt work when the engine is off as I have tried it.
     
  9. pappajohn

    pappajohn Funster Life Member

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    :thumb:

    as i said.....the 'majority'
     
  10. Braunston

    Braunston

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    Hi,

    My 2005 Bessacarr both the cigar type sockets in the cab area are off when the ignition is off and if you turn the ignition on to power the sockets then that will disable the habitation area power and pull the step in if you have it out. hope that helps
     
  11. wavester

    wavester

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    thanks for all the replies. i wanted to use it at the front where its out of the way, but sounds like it will "muller" the engine battery pretty quick if it works at all, so better have a rethink.:Doh:
     
  12. don

    don

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    Ive had 3 different make M/Hs and on all the lighter was dead when engine is turned off, almost sure the majority are like this.
    Its east enough to fit a new cigerette lighter or 12v socket and wire to your leasure battery,
    also very cheap.
    Cheers
    Don
     
  13. pappajohn

    pappajohn Funster Life Member

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    depends who does the conversion i suppose.

    had 2 swifts and a CI and all had live cigar socket when ign off:winky:
     
  14. Spacerunner

    Spacerunner

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    Looks like you're in a minority of one!

    Why anyone would want to use a cab 12 volt socket to power a fridge and flatten their starter battery is beyond belief.

    Any converter who would leave a cab 12 volt socket live is, IMO, acting irresponsibly.
     
  15. pappajohn

    pappajohn Funster Life Member

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    tell Swift that!!!!:RollEyes:

    very useful when i used my navman.
    no internal batteries and reset to 'new route' everytime it was unplugged and re-plugged.
    real pain if you stopped for fuel etc and had to re-enter ALL the details again.
    also, as its the only cigar socket in the van it does nicely as a phone/torch charger socket when on site.
     
    Last edited: Jul 19, 2009
  16. JayDee

    JayDee Funster

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    :whatthe:I had always thought the Autosleeper we had charged the vehicle battery as well when on hook-up, through the split charger (whatever that is :Blush:).

    Guess I was wrong, but thankfully never suffered any mishaps with it.:Cool:

    John
     
  17. derekfaeberwick

    derekfaeberwick

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    My Burstner- Elektroblock 99, charges hab + cab on EHU. Cig lighter is live all the time, irresponsible? Can't think why, useful? Very. :winky:

    I can also use the hab 12v when the vehicle is running, irresponsible? Useful ? It certainly suits me and if I couldn't do either then I'd be looking to change it so I could.
     
    Last edited: Jul 20, 2009
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