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Daveskater

posted on 29th Jan 09 at 16:16

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.


Adam-D

posted on 29th Jan 09 at 09:00

unplug the mfd then see what happens.


boz_gsi

posted on 29th Jan 09 at 00:54

as above get a multi meter across your batt wen running should be around 14v if not alts broke


barneykarl

posted on 29th Jan 09 at 00:20

Check volts of battery, then check with engine running should be about 14v if not alternator fault.


Luke

posted on 29th Jan 09 at 00:02

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

[Edited on 29-01-2009 by Luke]


Nic Barnes

posted on 28th Jan 09 at 20:16

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.


corsa_godfather

posted on 28th Jan 09 at 20:13

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

£10 later job sorted ;)


wozza51

posted on 28th Jan 09 at 19:46

take double realy out for the feul pump i had exactly the same thing with the same battery
:D


Luke

posted on 28th Jan 09 at 19:28

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.


John

posted on 28th Jan 09 at 19:24

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

posted on 28th Jan 09 at 19:13

Bump.


redtom

posted on 28th Jan 09 at 13:33

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

posted on 28th Jan 09 at 13:04

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.


Adam_B

posted on 28th Jan 09 at 13:02

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]


Fro

posted on 28th Jan 09 at 12:58

Dodgy earth somewhere? Or alternator, if there isn't a drain.


Luke

posted on 28th Jan 09 at 12:51

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?


Adam_B

posted on 28th Jan 09 at 12:48

fucked battery. take it back.


Luke

posted on 28th Jan 09 at 12:40

Not that im aware of mate :boggle:


DaveB

posted on 28th Jan 09 at 12:40

Must have a drain on it somewhere?
Alarm, stereo amplifier running on permanent live instead of ignition live etc?


Luke

posted on 28th Jan 09 at 12:38

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.