Lights are on but no one is in

Discussion in 'Motorhome Chat' started by Mizar, Feb 15, 2010.

  1. Mizar

    Mizar Read Only Funster

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    Got home from work this evening to find my motorhome with one side light on one rear number plate light on and the brake lights on the van was all locked up and keys in the house spooky.

    Its an 09 Ducato base, I started the van turned it off again and lights still on, went in the garage to get some tools to disconnect the battery came out brake lights gone off but one side light and one number plate light still on, turned around and then they had gone off.

    Just wondered if anyone else had any electrical problems with the Ducato i have disconnected the battery just to be safe and i will ring fiat in the morning as it is still under warranty.

    Ged:Doh:
     
  2. pappajohn

    pappajohn Funster Life Member

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    if it hasnt been used for a while and its a rear side light..........MICE !!!!:Eeek:

    they love to nibble electrical wiring and could have chewed the rear loom.

    could also be a fault on the canbus wiring system distribition board, if it is a canbus system.
     
  3. Mizar

    Mizar Read Only Funster

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    Thanks we did use it over the weekend with no problems i dont know which loom it is.

    thanks
    Ged
     
  4. hilldweller

    hilldweller Funster Life Member

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    Not really spooky, just the deep joys of complex electronic control of the simplest of circuity.

    These university trained "engineers" arrive in the factories and they know how to setup up a magnificent control system using a handful of wires instead of hundreds. So they sell the idea to management on cost and features.

    But those engineers have no experience of the real world and what happens when not one but a million are out there in the real world.

    We are the ones who live with the aftermath.

    What caused your problem I don't know. A genuine fault. Some high powered transmitter ( CB ?? ) that got past the screening. Lightning.
     
  5. Pampasgrass

    Pampasgrass Read Only Funster

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    Side lights

    Have you made sure that you have not left the indicator stork in an ON position or after you have entered your driveway and NOT cancelled it?
     
  6. Mizar

    Mizar Read Only Funster

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    Yes i thought that when i pulled up the drive but that is in the off position but i still does not explain the brake lights.
    thanks
    Ged
     
  7. pappajohn

    pappajohn Funster Life Member

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    i think thats a VW thing and wouldnt put the brakelights on anyway...just the sidelights on the side the stick is switched to....doesnt work like that on ducato's though unless the later models are different.:thumb:
     
  8. hilldweller

    hilldweller Funster Life Member

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    That is the big attraction of computer control - boss says to geek "Ehe, I lika the waya the VW putsa on it's sidelights". So 5 mins later geek says "Youa meena lika thees Boss".

    It's all so easy - 'till it goes wrong.


    How do you like the Italian accent - good eh !
     
  9. Bruce Burge

    Bruce Burge Read Only Funster

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    Lights on no one in

    Had same problem on a car(,fuse box full of water) rain, frost, snow, we have had recently may be the cause. Bruce
     
  10. pappajohn

    pappajohn Funster Life Member

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    you been watching the GODFATHER Brian ????

    ya dont need a geek to do that.....VW did it on the MK2 golf...nearest that got to a computer was the designers CAD program.
     
  11. Mizar

    Mizar Read Only Funster

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    Found the problem a big melted mess at the rear of the van i had a towbar fitted when we bought the van from new and the wiring from tow bar electrical socket goes in to a small black box that says universal wiring interface this box has melted it was stuck to the rear valance of the motorhome and it has got that hot its blistered the exterior of the valance whats worrying that when the ignition is off this box was still live and my self & partner and my 10 & 4 year old sons have been away in it this week end,

    The next problem is the interface on van and is it a fiat part or is it something the towbar installers fit it looks to me that the wiring loom is soldered into it and the tow bar electrics are connected into it. both parties are going to blame each other i would think.
     
  12. hilldweller

    hilldweller Funster Life Member

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    Ouch.

    Looks like your towbar installer has a lot of explaining to do.

    With CANBUS they have to supply an add on box to switch the trailer lights, looks like they screwed up.

    Yes a CANBUS circuit is always live, the principle is that one power wire feeds all and one electronic data wire tells remote blocks to turn on and off.

    Strange a fuse did not blow.
     
  13. bill2b

    bill2b Read Only Funster

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    Ged
    No idea re the problem but...

    Did you get my PM I sent yonks ago?

    :Doh:
    :Laughing:
     
  14. pappajohn

    pappajohn Funster Life Member

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    sounds like a canbus interface to me but i would expect it at the front...not soldered in at the back.

    not genned up on canbus but i think the whole system is permenently live and needs a signal to trigger and complete the circuit...different signal for different lights and works on an electronic relay system.

    there are far fewer wires in this system than a conventional wiring loom and one live wire can feed many different lights....maybe tail, brake, fog, reverse, indicators etc depending on the signal received at the control module.

    the interface usually plugs into the canbus control module under the dash or bonnet and overcomes the need for special relays.

    i think this is the same system that allows bulb failure warnings to show on the dashboard.
     
  15. pappajohn

    pappajohn Funster Life Member

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    agreed Brian....looks like they've soldered the interface directly to the wiring loom to save running the new trailer socket loom to the front.

    bet it wasnt a recognised towbar installer.
     
  16. Mizar

    Mizar Read Only Funster

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    Bill2b

    sorry no i never recieved any PM

    Ged

    Thanks for everyones replies but just to clear up would the interface have been supplied by the towbar installer and then plugged into a socket the loom.
     
  17. Johns_Cross_Motorhomes

    Johns_Cross_Motorhomes Trader - Motorhome & Accessory Sales

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    You know what, there are some clever buggers on Fun, PappaJohn and 'Grumpy!':Rofl1: Brian.

    Well done.

    Peter
     
  18. pappajohn

    pappajohn Funster Life Member

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    yes it would be supplied by the towbar fitters and are usually vehicle specific.
    they dont plug into the loom but into a dedicated socket on the control box at the front

    they can be expensive so a 'universal' interface is going to be a cheap option but definately not the best option.

    no alterations/additions to wiring is permitted as it confuses the control unit.
    it recognises there is supposed to be a certain load (ampage) on a circuit and if it senses a heavier load it doesnt know what to do....hence the proper interface.
     
  19. pappajohn

    pappajohn Funster Life Member

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  20. Geo

    Geo Trader - Funster

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    I hope Mizar doesn't go in guns a blazing following the "speculation" on here
    there are a lot of errors in the statements and suggestions made and he may look very silly
    it may be fiats problem it may be the tow bars fitters problem, but FAULT!!!! me thinks not
    It all worked fine once:Doh:
    The majority of dedicated can bus connections are not made to the front of a vehicle:Doh: they are factory fitted at the rear (for tow bars):RollEyes:

    Most of these are cut off by the converters as they extend the chassis and wiring so a universal one has to used:Wink:

    A simple sticking brake light switch may have over heated the towing interface causing the side light problems
    an electrical mishap :RollEyes:Fiat didn't go out of their way to fit a faulty switch(if thats what caused it) and the tow bar man didn't make the interface so why fault or blame, just responsibility it will get sorted, a lot faster with the right approach.

    Geo
     
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