tracing a battery drain

Discussion in 'Electronics' started by jonnyboy, Aug 1, 2011.

  1. jonnyboy

    jonnyboy Hardcore MB Enthusiast

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    1991 sl300-24 project,s124 280,w115 no interior, w108 project no engine
    Hi all

    Back in the uk soon and trying to get ahead of things not behind.
    Electronics are not my strong point but I have a multimeter so here goes:-

    I have a severe battery drain on my 300 sl24.
    How can I trace the cause? I really dont know where to start...
    TIA
     
  2. Diesel Benz

    Diesel Benz Hardcore MB Enthusiast

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    You could first define what "serious battery drain" means to you? Does the battery run flat overnight or in a week?

    If your battery is good, I'd measure the quiescent current from the battery lead with a MM and would start pulling off fuses. Once the drain drops, you would have an idea where it comes (does not have to be the exact control unit).

    Most likely there are typical consumers in your model, members familiar with this model could give accurate guidance for potential faults.
     
  3. balge

    balge Hardcore MB Enthusiast

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  4. kth286

    kth286 Hardcore MB Enthusiast

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    posssibly micro switches in boot/door locks stuck.
     

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