Vauxhall Corsa Battery Drain?

Question

Has anyone experianced a battery drain on a 95-2001 ish Vauxhall Corsa. I replaced the battery on mine but i think theres something draining the current as it discharges when left over night.. Any suggestions?? Thanks

Answer 1

sounds like your alarm if not buy a ford they just as sh1t

Answer 2

With everything turned off, do you get a spark when you connect the battery up? To have discharged a brand-new fully-charged battery overnight suggests quite a high current drain, which would show when you connect the terminals as a noticable spark. I presume when you initially connect it after charging, everything is fine & the engine starts promptly? If you use a multimeter, be aware that they can usually only measure up to 10Amp DC before fusing. There may be more than 10 Amps flowing here. I would connect a charged battery, wait 30mins & check if anything has become warm to the touch eg Stereo amplifier, ignition coil. Most things don't receive power when the ignition is off anyway, but still check (if you find things are working when they shouldn't be, perhaps your ignition relay is faulty). Is everything operating normally eg central locking on all doors, interior light goes out, car stereo, alarm. If something doesn't work then it could well be near-shorted/stalled & draining a lot of power, but not enough to blow it's fuse.

Answer 3

Hi

Check that nothing has been left on or is staying on overnight such as the boot light, which is a favorite for flattening batteries overnight. You can check this by shutting the rear hatch and then checking via the rear seats.

Other than that, your alternator diodes could be leaking to earth. Disconnect the battery negative lead (there will probably be a spark but don't worry), disconnect the big live lead from the alternator and insulate it with insulating tape, and then reconnect the battery negative.

If the battery is not flat the next morning then your alternator is the culprit.

Cheers

Geordie