domestric electric problem

Discussion in 'Tech/Mech General' started by bigbnb, Feb 19, 2015.

  1. bigbnb

    bigbnb Read Only Funster

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    Hi, my Fiat KonTiki L Chassis year 2000 has a problem, on the mains hook up all works perfectly, once unhooked no domestic power either to the lights, water pumps or fridge igniter etc. Domestic and starter batteries aok, just been into garage for a brake and chassis job but they unable to diagnose the problem as they can't get hold of a wiring diagram !! helllppp please,
     
  2. DavidG58

    DavidG58 Funster

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    sounds like your habitation battery is either duff or switched off, we had exactly the same condition last year when our habitation battery failed, everything runs fine from the charger

    good luck
     
  3. bigbnb

    bigbnb Read Only Funster

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    Thanks, makes sense what you say but battery appears ok, fuse appears ok and I don't think there is any on/off switch. There is the switch on the panel to switch between domestic and starter battery, altering that does not help. I will fit another battery so at least I know that's right
     
  4. DavidG58

    DavidG58 Funster

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    If the battery voltage is above 12.5V there is no point just changing it, can you measure it?
     
  5. Serendipitous

    Serendipitous Funster

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    What's actually displayed on the panel?

    Can you switch between batteries and see volts when you select view levels.

    Have you checked the power unit under the seat next to the fridge is switched on and all fuses ok.

    Are the main fuses in the offside storage locker ( lesiure battery area) ok?
     
  6. bigbnb

    bigbnb Read Only Funster

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    Hi, switching between batteries shows both in the green zone, there is no seat next to the fridge ! the main electrics appear to be in the wardrobe which is nearside rear of domestic side door. In there which is above the gas heater, there is a 240v domestic control unit, a battery charger, a nest of fuses bottom one is 15amp and there are five above that at 10amp there is a black relay next to that with the number 070799 there are five male terminals and a diagram showing 12v 30amp 86 87a 87 85 30 with lines joining etc. I have actually replaced that but new one is not exact replica.
    The leisure battery on my model is situated below the front passenger seat, with 10amp fuse on pos side. The front seat has to come out to remove battery. I have had that off this morning all seems OK also I have power going to switch near domestic door with a brown/blue and brown/green positive and red brown negative, those wire are quite heavy.
     
    Last edited: Feb 20, 2015
  7. TheBig1

    TheBig1 Funster Life Member

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    do you have a multimeter? if you do, disconnect the leisure battery and wait 30 minutes before measuring the voltage
     
  8. bigbnb

    bigbnb Read Only Funster

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    Just downloaded diagram from swift web site! Getting voltage through wiring to the switch by door so battery is OK
     
  9. TheBig1

    TheBig1 Funster Life Member

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    if the van is plugged in to the mains hookup, the charger circuit will replace the voltage from the leisure battery
     
  10. pappajohn

    pappajohn Funster Life Member

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    From your description its identical to our old one.

    The charger has an on off switch....cant remember if its on top, side or bottom of the unit, but that wont make any difference to 12v power...only the charge current.

    Below the seat next to the wardrobe, close to or even in the wardrobe, there should be a relay, this isolated the hab area when the engine is running.
    it may have jammed closed which would isolate all the 12v in the hab permanently.
    this can be bypassed by removing and taping up the supply terminal from the ign switch.(85 or 86) the other goes to earth.
    if that fails the relay will most likely be jammed or burnt closed try disconnecting the wires at terminals 87a and 30 then connect the two wires together....that bypasses the relay altogether and 12v will be available all the time, engine on or not.
     
  11. pappajohn

    pappajohn Funster Life Member

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    If the relay you replaced is the one i said then the new one MUST have the 87A terminal.
    with the engine off the relay is normally closed across 30 and 87A, start the engine and the circuit is broken.
    try moving the wire from 87A to 87.....87 is closed WITH power and is the one which may be burnt/jammed closed, 87A is closed WITHOUT power

    if that isnt the problem it wont cause any harm, but if it is then all should work ok.
     
  12. Serendipitous

    Serendipitous Funster

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    Sorry different Kontiki version to mine if you have a circuit diagram and a meter you should be able to work it out.

    Good luck
     
  13. bigbnb

    bigbnb Read Only Funster

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    will try all suggestions. Looking at wiring diagram with mag glass does not look as if it will help me ID all the bits under the bonnet
     
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