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car computors & jumper cables

Discussion in 'Hobby Electronics' started by S Roby, Feb 5, 2006.

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  1. S Roby

    S Roby Guest

    Hi there
    I was wondering just how using jumper cables to start a car with a flat
    battery could possibly burn out the car computor
    Is it an old wives tale??

    The only thing I can think of is IF the battery has gone open circuit
    thereby making the volt regulation of the alternator not work properly
    This seems improbhable thou...
  2. Lord-Data

    Lord-Data Guest

    Its very rare, and more myth than reality .. more-so applies to older cars
    ... ie, first generation with computers .. The connection of power as it
    comes through the jumper leads can make a spark as it connects, which can
    cause a spike in the wiring .. computers being sensitive to spikes and all,
    can sometimes be affected by this. Anything made in the 90's or better
    should definitly be protected in its own wiring from such actions, however
    ... But yeah, older ones can be a little susceptible.. but even then, its
    rare.. kinda like lightnig strikes actually blowing up TVs ..
  3. Lord-Data

    Lord-Data Guest

    Yeah, it can happen, but not every time there is a storm, as most people who
    pass on the myth (or sell surge protectors) will have you believe ..
  4. If your computer cannot stand a jump start, then it is highly likely
    that it is already fucked. As for ESD, well try telling that the the
    ignition coil driver and associated circuitry. Quite likey if the
    computer can survive the regular automotive environment then there is
    virtually no chance of a jump start killing it.
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