DAZ1985
Member
Registered: 3rd Sep 06
Location: Scholar Green, Cheshire
User status: Offline
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New battery 6months ago, keeps loosing charge over a few days when its been charged
Are my earths at fault
or
the alternator?
the belt is slipping which maybe the problem (not help anyway)
so thats first on the list this weekend
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luke85
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Registered: 26th Nov 07
Location: Chesterfield
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you need to stick a multimeter on the battery with the engine running mate and measure the voltage. Test it with nothing turned on at first then turn everythin on and measure it again, let us know the results and youll know if the alternator is ok or not
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DAZ1985
Member
Registered: 3rd Sep 06
Location: Scholar Green, Cheshire
User status: Offline
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11.70-12.20 not started
13.40 when started
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tom_simes
Show Staff
Organiser: South Wales
Premium Member
Registered: 12th Jan 05
Location: Undy, Newport Drives: Skoda Octavia vRS estate
User status: Offline
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Alternator is working then, although like you said the loose belt won't be helping.
When the car is swaitche on though, it normally reads around 14.4V at the battery?
That battery doesn't sound good though, wouldn't surprise me if you have something draining it - do you get the voltage slowly dropping while the engine isn't running?
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DAZ1985
Member
Registered: 3rd Sep 06
Location: Scholar Green, Cheshire
User status: Offline
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Yes the voltage drops slightly when its not started but im not 100% i had the ignition off 
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tom_simes
Show Staff
Organiser: South Wales
Premium Member
Registered: 12th Jan 05
Location: Undy, Newport Drives: Skoda Octavia vRS estate
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try it with the ignition off completely, keys out as well, then see if the voltage is dropping.
If it is, you've got a drain - then comes the fun of trying to trace it
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DAZ1985
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Registered: 3rd Sep 06
Location: Scholar Green, Cheshire
User status: Offline
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First places to check if thats the case?
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ali_corsa
Member
Registered: 30th Jun 07
Location: Tamworth Drives: Focus st
User status: Offline
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is it the right battery for the car, i know in some cases places just give you any old battery
[Edited on 09-04-2008 by ali_corsa]
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DAZ1985
Member
Registered: 3rd Sep 06
Location: Scholar Green, Cheshire
User status: Offline
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brand new corsa diesel battery. its defo new
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phil_sutton
Member
Registered: 8th Sep 07
Location: Nottingham
User status: Offline
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Bet its a bad earth and thus holding a relay open when the ignition is off. Good luck finding it lol
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DAZ1985
Member
Registered: 3rd Sep 06
Location: Scholar Green, Cheshire
User status: Offline
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Thanks
Think ill start check that all connections are tight in the easy places first
Cheers for the info anyway 
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craig_s
Member
Registered: 5th Mar 06
Location: Birmingham Drives: mk4 astra gsi
User status: Offline
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did you fit anything new around the time it started happening?you may have wired something pemanent live when it should be switched live,like a gauge or something.
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DAZ1985
Member
Registered: 3rd Sep 06
Location: Scholar Green, Cheshire
User status: Offline
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All ignition bar the headunit, which is always off when i get out of the car
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Pucci1
Member
Registered: 19th Oct 07
User status: Offline
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i think i went thought something like this on a college test today it may help...
Tale the postive off the battery and recomplete the circuit with the probes of your mutimeter, turn the mutimeter onto current (i belive it's that one) Now dont start the engine on or anything no headlamps nothing at all...
Now if you belive something is at fault for example your boot light is staying on..
What you want to do is watch the mutimeter and get a friend to pull out fuses from your fuses board.
Pull out your first fuse, does the muti meter move at all? if not its that, put it back in and move onto the next one, do so until you or your friend see's the muti meter move.
When or if you find the fuse that moves the muti meter reading,
example its the fuse 12 look your at your haynes manual or on here somewhere i guess, and you will notice its the boot lamp fuse for example.
This was the answer for my college test i think of the top of my head hope it is some help to you 
-Nat
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DAZ1985
Member
Registered: 3rd Sep 06
Location: Scholar Green, Cheshire
User status: Offline
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Im following you in a fashion
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