Mystery box in engine compartment

Discussion in 'Tech/Mech General' started by barrywi, Dec 15, 2012.

  1. barrywi

    barrywi Read Only Funster

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    Under the bonnet of my 1998 Autotrail Cheyenne( Boxer based) there is a mystery box about 31/2 by 21/2 inches and about an inch thick. There are 3 wires which enter it and it seems to be a plastic frame filled in wilth an Aradite sort of hard material. The three wires are red, brown and black with the black connected to earth by the battery.Cannot think what it could be unless it is connected to the alarm system. It is just hanging on the wires on the left hand side of the engineand goes into loom which may be the work of Autotrail. It does not look as if it was fitted when the van was made in the Peugeot factory. Any idea what it may be?
     
  2. Steve_UK

    Steve_UK Read Only Funster

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    Hi,

    Sounds like a Battery Master. See http://www.campervanstuff.com/shop_stuff/index.php?mod=product&id_prd=976.

    If so, it connects the leisure battery to the engine battery in such a way as to provide a small charge (up to just over 1 amp) whenever the leisure battery voltage exceeds that of the engine battery by 0.5V.

    Especially useful if you have a solar panel keeping the leisure battery topped up while parked up for extended periods, in which case the engine battery is also kept charged.

    The box ensures that the engine battery does not charge the leisure battery as that could lead to starting issues!

    Hope that helps.

    Steve
     
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  3. chesterfield hooligan

    chesterfield hooligan Funster

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    :Rofl1: its for warming up pastie's on :Rofl1:
     
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  4. tofo

    tofo Funster

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    one like this http://mobile.maplin.co.uk/module.aspx?moduleno=37767

    used one on my self build
    with a switch on the live feed
    to the leisure battery

    :thumb::thumb::thumb:
     
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