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Author Auto Electrics - What would draw 2.5Amps when the car is off?
Whittie
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Registered: 11th Aug 06
Location: North Wales Drives: BMW, Corsa & Fiat
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18th Jan 11 at 16:59   View User's Profile U2U Member Reply With Quote

Right, the car is off, and draws 2.4-2.7 amps out of the battery. Thus draining the battery quite quickly.

The charge on the battery is around 13.4 - Ideally should be 14 when running.

Interior Light - Off (Would only be 1amp at the most)
Radio - Off
Boot Light - Off
Main Lights - Off, Turned them on with the car off and it doubled to around 5amps.

Now then, what would a car alarm draw out?

This is really confusing now, can't figure out at all what the drain is.

Any ideas?

Thanks
barneykarl
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Registered: 29th Jul 06
Location: Stevenage
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18th Jan 11 at 18:08   View User's Profile U2U Member Reply With Quote

I would guess at a duff battery poor plate shorting to earth, try a new battery or borrow one and i bet the drain goes away.
Whittie
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Registered: 11th Aug 06
Location: North Wales Drives: BMW, Corsa & Fiat
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18th Jan 11 at 18:12   View User's Profile U2U Member Reply With Quote

Put a brand spanking new battery on last night, was dead by this morning.

Changed the car battery terminals from old ones too.
pow
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Registered: 11th Sep 06
Location: Hazlemere, Buckinghamshire
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18th Jan 11 at 18:33   View Garage View User's Profile U2U Member Reply With Quote

Clean the terminals and check the earths.

larm?
Whittie
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18th Jan 11 at 18:34   View User's Profile U2U Member Reply With Quote

Terminals are brand new. Ordered them with the battery (as above). Earths are fine too.

Alarm - I can't see it been such a drain tbh? Any idea what it should be? I'm assuming less than half an amp, even that seems high.
AuroraSport
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Registered: 5th Mar 05
Location: Norfolk Drives: Audi B5 S4 Avant
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18th Jan 11 at 18:49   View User's Profile U2U Member Reply With Quote

Might be worth disconnecting things one at a time while measuring, see if the drain goes away?
Ian
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Registered: 28th Aug 99
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18th Jan 11 at 19:11   View Garage View User's Profile U2U Member Reply With Quote

That's not normal usage. You tried pulling each fuse in turn?
Whittie
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Registered: 11th Aug 06
Location: North Wales Drives: BMW, Corsa & Fiat
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18th Jan 11 at 19:32   View User's Profile U2U Member Reply With Quote

Not yet, will give it a go in the morning when its light. This is the problem from after Christmas mate, the door didn't sort it!
barneykarl
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18th Jan 11 at 19:56   View User's Profile U2U Member Reply With Quote

oh right, need a auto sparky to take a look at it I think.
Ian
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18th Jan 11 at 19:56   View Garage View User's Profile U2U Member Reply With Quote

Not before isolating everything, cheap.
Whittie
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Registered: 11th Aug 06
Location: North Wales Drives: BMW, Corsa & Fiat
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18th Jan 11 at 20:11   View User's Profile U2U Member Reply With Quote

Aye, they'll spent £50 (an hour) doing a diagnoses which can be done with a £5 multimeter. Once I know what It is I can just tell them. (Unless its something I don't need, and will just take fuse out )
JaffaTB
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Registered: 7th Oct 09
Location: Sheffield, South Yorkshire
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18th Jan 11 at 21:43   View User's Profile U2U Member Reply With Quote

is the radio still in? mine used to drain the battery even with the fascia removed as the wires where set a certain way (the red and yellow ones) if i didnt drive it every day it would drain and be flat
Whittie
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Registered: 11th Aug 06
Location: North Wales Drives: BMW, Corsa & Fiat
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18th Jan 11 at 22:34   View User's Profile U2U Member Reply With Quote

Yeah it is, but turns off after engine dies. Will have a fiddle tomorrow with it.
Jas
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18th Jan 11 at 23:55   View User's Profile U2U Member Reply With Quote

havent got a fucked tracker fitted? somewhere?
AlexW
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Registered: 25th Oct 08
Location: Essex
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19th Jan 11 at 03:13   View User's Profile U2U Member Reply With Quote

Alarms are normally blamed for power loss but not normally the cause lol Unless they have been wired up shitly.

As said, pull the fuses, What car is it?
Whittie
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Registered: 11th Aug 06
Location: North Wales Drives: BMW, Corsa & Fiat
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20th Jan 11 at 16:17   View User's Profile U2U Member Reply With Quote

Spent two hours on it last night, and couldn't find the fault.

Auto Electrician spent two hours on it today, passenger side heated mirror glass. £100 to find that is it a bit of a bitch.
Whittie
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Registered: 11th Aug 06
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23rd Jan 11 at 12:27   View User's Profile U2U Member Reply With Quote

Dead again
JaffaTB
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Registered: 7th Oct 09
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23rd Jan 11 at 14:35   View User's Profile U2U Member Reply With Quote

and you are £100 down lol
Whittie
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Registered: 11th Aug 06
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23rd Jan 11 at 22:53   View User's Profile U2U Member Reply With Quote

Going to drop it back off there.
craig_s
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Registered: 5th Mar 06
Location: Birmingham Drives: mk4 astra gsi
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24th Jan 11 at 00:09   View User's Profile U2U Member Reply With Quote

is there a back up for the alarm?
Cossie
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Registered: 17th May 02
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24th Jan 11 at 06:52   View User's Profile U2U Member Reply With Quote

Had the same problem and found out it was my radio even with face removed and no key. It will drain the battery in a day. Solution was the remove no 1 fuse in the fuse box when car not used.

 
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