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Flat Battery

  • 18-02-2011 10:24am
    #1
    james098
    Closed Accounts Posts: 105 ✭✭


    My wife just bought 92 Toyota MR2 the battery was flat when we got it so yesterday morning I jump started the car and she drove to garage and bought brand new battery this morning it was flat again I did note when I went out to start the car for her door wasnt closed fully but the internal light wasnt working when we got it but would it still be using power as though it was if door was left ajar


Comments

  • #2
    thenightrider
    Registered Users, Registered Users 2 Posts: 1,647 ✭✭✭thenightrider


    The alternator could be gone and that is what killed the 1st battery if your new battery was not being charged by the alternator your new battery would be flat.


  • #3
    jimmyw
    Registered Users, Registered Users 2 Posts: 3,382 ✭✭✭jimmyw


    Well its the actual light on that flattens the battery, so if that's not on then it wont go flat then.Could also be a drain somewhere too.Is your battery light on the dashboard on? If it is then the alternator needs repair/replacing.


  • #4
    Slidey
    Closed Accounts Posts: 12,811 ✭✭✭✭Slidey


    It could be anything in the car that is draining the battery overnight.

    If you have a multimeter you could check to to see if it is charging, it should be putting out more than 13v when running.

    If you have an ammeter you could check the draw off the battery when all doors closed and ignition off and then do it again with the alternator disconnected to rule out that as the cause for flattening the battery


  • #5
    pie-man
    Registered Users, Registered Users 2 Posts: 60 ✭✭pie-man


    i think youll find your best bet is to find a component mechanic/auto sparks to check this out for you. sure you can check the obvious stuff and make sure theres no lights staying on etc but barring that youll need someone who understands car eletronics. or maybe you could buy a cheap multimeter if you dont have one already and then got to autoshop101 to learn about basic automotive eletronic theory. sorry if i sound condesending but judging by your first post i dont think your skills would be up to the task. again if im wrong then why dont you tell us some of the checks youve already made and possibly recievve advice from other members e.g more things to check/test etc. its unlikely someone will come along with a silver bullet and tell you exactly whats causing your issue. this sort of job is a progressive one.


  • #6
    james098
    Closed Accounts Posts: 105 ✭✭james098


    yea your right pie man dont have a clue gonna take it to mechanic who specialises in electrics just put post up in case it was something simple and to save the few pound i dont really have to be honest it was my wife that bought the car I wouldnt have touched it but thanks to all sugestions


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