Battybird 0 Posted Monday at 06:55 PM Report Share Posted Monday at 06:55 PM Battery drain connect charger after a minute or so there is a whirring noise from under the bonnet voltage jumps from 6 volts to 13 anyone have any ideas why ? Quote Link to post Share on other sites
Greydog 174 Posted Wednesday at 07:28 AM Report Share Posted Wednesday at 07:28 AM Morning William Welcome to the Forum First how old is your battery ? What is it's condition ? If your getting a "whirring noise" you need to see what it is that's running Cooling Fan ? Recirculation Fan ? Emissions Fan ? Fuel Pump ? Is the key in the ignition (it shouldn't be) If you have a system that is damaged and running try pulling the fuse obviously what ever it is it needs repair/replacement If Battery voltage is bellow 12 volts at rest "engine off" it is probably dead and needs replacing, when charging you should be connecting the charge at the charge points under the bonnet. A fully charged battery should be 12.8volts engine off, around 14.5+ volts engine running. Dave Quote Link to post Share on other sites
Battybird 0 Posted Wednesday at 01:51 PM Author Report Share Posted Wednesday at 01:51 PM Hi battery is 3 months old just went to start car, battery flat even though it started and ran 15 minutes ago. I put multi meter on with key out of the ignition voltage was jumping all over the place, what would make the voltage unstable? Quote Link to post Share on other sites
Greydog 174 Posted Wednesday at 05:43 PM Report Share Posted Wednesday at 05:43 PM Hi Where are you measuring the voltage? Your car has around 25 control modules all of which communicate with each other over the Bus system so with out diagnostics very hard to tell. though you could pull fuses until you find the culprit. But not necessarily the cause When the new battery was fitted was it fitted correctly? is it the correct battery and type for the car? was it correctly registered to the chassis ? If the battery is not correct, does your car gave stop/start, then it quite possibly is dead, if it isnt registered to the chassis it wont charge correctly. Dave Quote Link to post Share on other sites
Battybird 0 Posted Wednesday at 07:48 PM Author Report Share Posted Wednesday at 07:48 PM Measuring under bonnet replaced battery with the same. Have now tried another battery, will check in the morning cheers Quote Link to post Share on other sites
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