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Old 04-02-2019, 20:37   #1
Pulsarlee
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battery drain

Evening everyone,
i have what seems to be a drain on my battery on my Evo 7. Fitted a brand new battery but after the car has been stored for 24 hours its flat again.. sick of the unreliability and uncertainty.i know nothing about electrics let alone those on an evo... any ideas how to trace the source or any good auto electricians in the sheffield or chesterfield area who might be able to detect the draw would be appreciated.
Car rund great once started by the way.
is this likely to be a difficult job?

Thanks guys
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Old 04-02-2019, 22:54   #2
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This is a bit over the top but watching it will give you an understanding of what’s probably happening ��.
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Old 05-02-2019, 07:17   #3
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Plenty of guides about, but basically:

Fit an Ammeter (at least 10A reading) in circuit with the battery, black lead to the negative battery post, red lead to the negative terminal.

A normal drain is in the region of 50mA (0.05A). If you have a larger reading, pull fuses until the drain goes.

Once you know which circuit the drain is on, follow it up until you get to the fault.

If none of the fuses kill the drain, I've seen it be the starter (solenoid) or alternator (diode pack) so disconnect them and see if it goes.

They're not generally hard to find, you just need to work methodically.
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Old 05-02-2019, 09:06   #4
RaeTurbo
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Make sure you have your code for the radio before you start.
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Old 06-02-2019, 18:43   #5
Pulsarlee
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Thanks guys much appreciated and helpful, I think the draw may be from the started solenoid as I have heard a funny noise almost short like when starting it on occasions. does the solenoid come separately or with the starter motor? Also, is there a fuse or relay for the starter or is it just a direct live to the battery?

sorry about the daft questions, only I dont understand electrics at all.

Thanks again,

Lee
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Old 06-02-2019, 19:58   #6
jhfozzy
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If you're not confident doing it, you could end up going in circles with a drain and possibly damage something.

It may be easier (and cheaper) letting someone have a look, it would be a max of an hour chasing down a drain.
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Old 06-02-2019, 22:10   #7
RaeTurbo
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Agree. Give all the info you’ve found to someone you trust to have a look at it, and it shouldn’t take long to find the problem.
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Old 07-02-2019, 18:42   #8
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Go to source sounds in Sheffield, ask for Kristian

They just sorted mine out and all good

Plus get a decent battery agm
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Old 09-02-2019, 18:52   #9
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thanks for that mate, ill give them a call on monday. Was your a short too?what turned out to be the cause?
cheers
Lee
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Old 09-02-2019, 19:03   #10
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Check the simple stuff too, boot light going off when closed, anything staying on when keys are out, especially anything aftermarket. After that if your not sure, then as above, probably far easier to get a pro on it. Far too easy to miss the issue and chase your tail on stuff like this

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Old 10-02-2019, 16:43   #11
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Old tracker back up battery was flat cause drain
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Old 10-02-2019, 17:02   #12
Pulsarlee
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thanks everyone. this has given me a great understanding.
just a couple of questions though, when the practise is to remove each fuse after hooking up to the multi meter, should you also remove the relay boxes one by one when tracing the drain?
also, is there a fuse for the starter motor?
dont think im going to do this myself as stated above, but do find this interesting.

cheers,

Lee
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Old 10-02-2019, 18:29   #13
jhfozzy
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The relays can stick in sometimes, headlight relays on the Clio are common but obvious as the headlights are on, lol.

No fuse on the starter main circuit, disconnect the feed from the battery terminal itself.
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