Luke
Member
Registered: 9th Dec 05
Location: Oxford Drives:Corsa B C20LET
User status: Offline
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Any ideas why my battery might keep going flat? Got a new halfords 750a one on. I'll leave the car for no longer than 24 hours & it's flat as a pancake.
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DaveB
Member
Registered: 29th Dec 00
Location: Huddersfield
User status: Offline
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Must have a drain on it somewhere?
Alarm, stereo amplifier running on permanent live instead of ignition live etc?
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Luke
Member
Registered: 9th Dec 05
Location: Oxford Drives:Corsa B C20LET
User status: Offline
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Not that im aware of mate 
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Adam_B
Member
Registered: 13th Dec 00
Location: Lancashire
User status: Offline
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fucked battery. take it back.
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Luke
Member
Registered: 9th Dec 05
Location: Oxford Drives:Corsa B C20LET
User status: Offline
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quote:
Originally posted by Adam_B
fucked battery. take it back.
It's not a fucked battery. I've tried 3 different batterys & it's the same thing, keeps going flat. Could the alternator be fucked?
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Fro
Member
Registered: 20th Jun 06
Location: Rainham, Essex Drives: A3 2.0TDi Sport
User status: Offline
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Dodgy earth somewhere? Or alternator, if there isn't a drain.
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Adam_B
Member
Registered: 13th Dec 00
Location: Lancashire
User status: Offline
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If its going flat when your not driving it then there is something draining it like Dave said. If the alternator is not working then it just wont be getting a charge when your driving along I think. I dont know if its possible for an alternator to go fucked and drain a battery rather than charge it?
[Edited on 28-01-2009 by Adam_B]
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Luke
Member
Registered: 9th Dec 05
Location: Oxford Drives:Corsa B C20LET
User status: Offline
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How would i find out if something is draining the battery? I have no amps ect, i have a head unit but as far as i'm aware it's not wired live to the battery.
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redtom
Member
Registered: 6th Oct 07
Location: Kent
User status: Offline
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My ecu on my XE got water in it and was draining the battery over night. try unplugging your fuel relay see if it still goes flat. could also be the relay itself
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Luke
Member
Registered: 9th Dec 05
Location: Oxford Drives:Corsa B C20LET
User status: Offline
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Bump.
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John
Member
Registered: 30th Jun 03
User status: Offline
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Is it going flat just sitting there or when you drive it?
If its when you drive it it's probably alternator, if it's when it's just sitting there something is draining it.
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Luke
Member
Registered: 9th Dec 05
Location: Oxford Drives:Corsa B C20LET
User status: Offline
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John, It only does it when it's sitting on the drive. I started the car on monday night for a good 10 minutes. I went to start the car today about 12ish & it was flat.
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wozza51
Member
Registered: 9th Apr 08
Location: Croydon
User status: Offline
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take double realy out for the feul pump i had exactly the same thing with the same battery
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corsa_godfather
Member
Registered: 6th May 03
Location: Greenock,Scotland
User status: Offline
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my fuel pump relay was fucked and staying on a constant live and draining the battery.
£10 later job sorted 
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Nic Barnes
Member
Registered: 5th Apr 04
Location: nowhere near ginger people
User status: Offline
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could be a bad earth. if the earth off the inlet manifold to the alt adjuster is broken, alt wont charge properly, but battery light will stay off.
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Luke
Member
Registered: 9th Dec 05
Location: Oxford Drives:Corsa B C20LET
User status: Offline
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It's getting annoying keep taking the battery out & putting it on charge  .
[Edited on 29-01-2009 by Luke]
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barneykarl
Member
Registered: 29th Jul 06
Location: Stevenage
User status: Offline
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Check volts of battery, then check with engine running should be about 14v if not alternator fault.
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boz_gsi
Member
Registered: 12th Apr 07
Location: stoke-on-trent
User status: Offline
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as above get a multi meter across your batt wen running should be around 14v if not alts broke
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Adam-D
Member
Registered: 11th May 02
Location: Cheshire
User status: Offline
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unplug the mfd then see what happens.
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Daveskater
Premium Member
Registered: 29th Apr 08
Location: Oxford, UK Drives: Jap wagon
User status: Offline
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Have you run the car for a couple of hours to charge the battery? a 10 minute charge won't make a difference. On a meter it will show as charged, but it won't hold it.
Numberwang!
Originally posted by AlunJ
I like you Dave, you are a man of men
Originally Whatapp'd by Neo
Dave's maybe capable of a drive-by cuddle
Look at my pictures
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