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Disconnecting Battery Terminals

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  • 20-03-2008 3:30am
    #1
    You
    Closed Accounts Posts: 63 ✭✭


    Folks, I need to do some work on my motor which will involve disconnecting the battery cables. I've heard of some people loosing imobiliser codes and the like..can this be true. I'd expect to have to unlock the radio, but that would be the extent to it...
    Anyone encounter unexpected issues when power was reconnected??
    Thks,:confused:


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    #2
    Lucifer
    Registered Users Posts: 1,467 ✭✭✭Lucifer


    the only think I have ever had to reset after disconnecting a battery was radio code and date and time, I suppose it is possible for there to be execptions to the rule but I've never come across one. Give a bit more info such as make model and year and you should get a better answer.


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    #3
    crosstownk
    Registered Users Posts: 12,863 ✭✭✭✭crosstownk


    Just be sure to have the key in your pocket! If you have the key in the ignition and turned to 'off' it is possible that some systems may be still active (depending on the make & year) and this may cause some warning lights to come on. Once the key is removed you should be OK.
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    #4
    Seth Brundle
    Moderators, Politics Moderators Posts: 39,750 Mod ✭✭✭✭Seth Brundle


    And disconnect the negative terminal first and when refitting reconnect it last!!!


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    #5
    Run_to_da_hills
    Closed Accounts Posts: 20,009 ✭✭✭✭Run_to_da_hills


    kbannon wrote: »
    And disconnect the negative terminal first and when refitting reconnect it last!!!
    Unless its a positive earth car. ie Micky Minors, old Minis etc.


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    #6
    Cmar-Ireland
    Registered Users Posts: 2,340 ✭✭✭Cmar-Ireland


    I don't know if this is true, but I've heard you can wire a regular 9V PP3 battery across the terminals before removing the car battery and this is supposed to retain radio stations.
    :confused:


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    #7
    You
    Closed Accounts Posts: 63 ✭✭You


    Thanks for all the info folks...
    It's a '05 VW Golf BTW....


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    #8
    crosstownk
    Registered Users Posts: 12,863 ✭✭✭✭crosstownk


    You wrote: »
    It's a '05 VW Golf BTW....

    In that case, the stereo should be matched to the engine control unit. So there should be no need to input the radio code. Once a VW stereo is connected to the same engine ECU, it will recognise it as the same ECU as last connected to.

    That said, no harm to have the code - just in case!
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