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Author Battery keeps going flat.
Luke
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Registered: 9th Dec 05
Location: Oxford Drives:Corsa B C20LET
User status: Offline
28th Jan 09 at 12:38   View User's Profile U2U Member Reply With Quote

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.
DaveB
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Registered: 29th Dec 00
Location: Huddersfield
User status: Offline
28th Jan 09 at 12:40   View User's Profile U2U Member Reply With Quote

Must have a drain on it somewhere?
Alarm, stereo amplifier running on permanent live instead of ignition live etc?
Luke
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Registered: 9th Dec 05
Location: Oxford Drives:Corsa B C20LET
User status: Offline
28th Jan 09 at 12:40   View User's Profile U2U Member Reply With Quote

Not that im aware of mate
Adam_B
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Registered: 13th Dec 00
Location: Lancashire
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28th Jan 09 at 12:48   View User's Profile U2U Member Reply With Quote

fucked battery. take it back.
Luke
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Registered: 9th Dec 05
Location: Oxford Drives:Corsa B C20LET
User status: Offline
28th Jan 09 at 12:51   View User's Profile U2U Member Reply With Quote

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?
Fro
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Registered: 20th Jun 06
Location: Rainham, Essex Drives: A3 2.0TDi Sport
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28th Jan 09 at 12:58   View User's Profile U2U Member Reply With Quote

Dodgy earth somewhere? Or alternator, if there isn't a drain.
Adam_B
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Registered: 13th Dec 00
Location: Lancashire
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28th Jan 09 at 13:02   View User's Profile U2U Member Reply With Quote

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]
Luke
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Registered: 9th Dec 05
Location: Oxford Drives:Corsa B C20LET
User status: Offline
28th Jan 09 at 13:04   View User's Profile U2U Member Reply With Quote

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.
redtom
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Registered: 6th Oct 07
Location: Kent
User status: Offline
28th Jan 09 at 13:33   View User's Profile U2U Member Reply With Quote

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
Luke
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Registered: 9th Dec 05
Location: Oxford Drives:Corsa B C20LET
User status: Offline
28th Jan 09 at 19:13   View User's Profile U2U Member Reply With Quote

Bump.
John
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Registered: 30th Jun 03
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28th Jan 09 at 19:24   View User's Profile U2U Member Reply With Quote

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.
Luke
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Registered: 9th Dec 05
Location: Oxford Drives:Corsa B C20LET
User status: Offline
28th Jan 09 at 19:28   View User's Profile U2U Member Reply With Quote

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.
wozza51
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Registered: 9th Apr 08
Location: Croydon
User status: Offline
28th Jan 09 at 19:46   View User's Profile U2U Member Reply With Quote

take double realy out for the feul pump i had exactly the same thing with the same battery
corsa_godfather
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Registered: 6th May 03
Location: Greenock,Scotland
User status: Offline
28th Jan 09 at 20:13   View User's Profile U2U Member Reply With Quote

my fuel pump relay was fucked and staying on a constant live and draining the battery.

10 later job sorted
Nic Barnes
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Registered: 5th Apr 04
Location: nowhere near ginger people
User status: Offline
28th Jan 09 at 20:16   View User's Profile U2U Member Reply With Quote

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.
Luke
Member

Registered: 9th Dec 05
Location: Oxford Drives:Corsa B C20LET
User status: Offline
29th Jan 09 at 00:02   View User's Profile U2U Member Reply With Quote

It's getting annoying keep taking the battery out & putting it on charge .

[Edited on 29-01-2009 by Luke]
barneykarl
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Registered: 29th Jul 06
Location: Stevenage
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29th Jan 09 at 00:20   View User's Profile U2U Member Reply With Quote

Check volts of battery, then check with engine running should be about 14v if not alternator fault.
boz_gsi
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Registered: 12th Apr 07
Location: stoke-on-trent
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29th Jan 09 at 00:54   View User's Profile U2U Member Reply With Quote

as above get a multi meter across your batt wen running should be around 14v if not alts broke
Adam-D
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Registered: 11th May 02
Location: Cheshire
User status: Offline
29th Jan 09 at 09:00   View User's Profile U2U Member Reply With Quote

unplug the mfd then see what happens.
Daveskater
Premium Member

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Registered: 29th Apr 08
Location: Oxford, UK Drives: Jap wagon
User status: Offline
29th Jan 09 at 16:16   View Garage View User's Profile U2U Member Reply With Quote

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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