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Thread: Right procedure for battery removal & jump starting

  1. #1
    Join Date
    Feb 2005
    Location
    Penang, Malaysia
    Posts
    243

    Default Right procedure for battery removal & jump starting

    folks, 2 separate questions:
    1. when removing battery, which should i disconnect first: +ve or -ve cable? how about when attaching the battery?

    2. when jump starting a car, which cable should be connected first?

  2. #2
    Join Date
    Mar 2004
    Location
    NSW, Australia
    Posts
    445

    Default negative

    Quote Originally Posted by ktteoh
    folks, 2 separate questions:
    1. when removing battery, which should i disconnect first: +ve or -ve cable? how about when attaching the battery?

    2. when jump starting a car, which cable should be connected first?
    comes off first and negative always goes on last
    Q2. Connect +ive first negative last

  3. #3
    Join Date
    Dec 2003
    Location
    Wellington,New Zealand
    Posts
    3,868

    Default

    some people also recomend that the headlights etc are on I think to act as a "sink" for voltage spikes when you connect and disconnect??
    Gone but not forgotten

  4. #4
    Join Date
    Feb 2006
    Location
    Oldham, England
    Posts
    3,078

    Default

    If you remove your battery for charging be careful about locking your doors manually. You may not be able to open the again!
    Oct '00 E46 330i. Feb '92 525i (departed)

  5. #5
    Join Date
    Apr 2007
    Posts
    84

    Default

    Quote Originally Posted by mamilapon
    comes off first and negative always goes on last
    Q2. Connect +ive first negative last
    this is a question i wondered my self and had contradicting views on the internet. mine always sparks as i reconnect the negative with the hazard lights starting to flash....wierd.
    1995 m50 520i executive

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