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Author Topic: Battery drain / charging problem.  (Read 7961 times)

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Migv6 le Frog Fan

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Battery drain / charging problem.
« on: 27 December 2018, 08:31:50 »
A few weeks ago I found the Omega had a flat battery one morning. Jump started it and it was ok for a few days, then the same thing happened again.
Changed the battery for a known good spare, but a few days later I had a flat battery again. I found it flat again yesterday, so jump started it and let it run for about 10 minutes to put some charge in. I also disconnected the Nokia Bluetooth I installed just before the problem appeared, as I thought that might be the cause of he drain.
Decided to bring it to work this morning to put a decent charge in the battery and found it flat again. Jump started it and off a I went.
After 15 miles, just before I got to work, the battery light on the dash starting to slowly flash on and off. On for two/ three seconds, then off for the same amount of time.
Just been and checked aux. belt and that looks ok, so assume this indicates alternator fault ? If so, I don't see how it would be the cause of the original fault as the car seemed fine apart from when it was left for a few days for the battery to drain ?
Two separate electrical faults, or am I missing something ?
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Doctor Gollum

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Re: Battery drain / charging problem.
« Reply #1 on: 27 December 2018, 09:06:54 »
Following Kevin's excellent guide to the letter and report back ;)
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Migv6 le Frog Fan

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Re: Battery drain / charging problem.
« Reply #2 on: 27 December 2018, 11:56:04 »
Will do.  :y Im at work today, but might be able to do it here.
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Migv6 le Frog Fan

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Re: Battery drain / charging problem.
« Reply #3 on: 27 December 2018, 13:28:17 »
Just did a quick run through with Kevins guide. Aborted first attempt as battery was so flat that electrics were doing weird things and readings started off ok but then always dropped quickly once I attached the multimeter.
Speaking of which Im using a Fluke meter at work rather than my cheap £4.99 version I use at home, so I might be doing it all wrong anyway. ::)
Changed to the spare battery I have in the boot which gave a reading of 11.75 v with engine off and no load.
Switching headlights on dropped the voltage to 11.3v

Started engine and recorded 11.08v at idle and 11.0v with engine running at 200rpm.

Doesn't seem very conclusive so far, need a fully charged battery and time to inspect wiring connections, but possibly alternator fault ?
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Nick W

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Re: Battery drain / charging problem.
« Reply #4 on: 27 December 2018, 14:01:43 »
11 volts with the engine running means the alternator isn't charging. But before you condemn it, check the voltage at the connections on the alternator. If that is still 11v, then you need a replacement.
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Migv6 le Frog Fan

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Re: Battery drain / charging problem.
« Reply #5 on: 27 December 2018, 14:21:45 »
Cheers, will do.  :y
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Shackeng

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Re: Battery drain / charging problem.
« Reply #6 on: 27 December 2018, 14:46:53 »
Quote from: Migv6 on 27 December 2018, 13:28:17
Just did a quick run through with Kevins guide. Aborted first attempt as battery was so flat that electrics were doing weird things and readings started off ok but then always dropped quickly once I attached the multimeter.
Speaking of which Im using a Fluke meter at work rather than my cheap £4.99 version I use at home, so I might be doing it all wrong anyway. ::)
Changed to the spare battery I have in the boot which gave a reading of 11.75 v with engine off and no load.
Switching headlights on dropped the voltage to 11.3v

Started engine and recorded 11.08v at idle and 11.0v with engine running at 200rpm.

Doesn't seem very conclusive so far, need a fully charged battery and time to inspect wiring connections, but possibly alternator fault ?

???  2000 perhaps?
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robson

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Re: Battery drain / charging problem.
« Reply #7 on: 27 December 2018, 15:24:39 »
must be alternator surely :y
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Migv6 le Frog Fan

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Re: Battery drain / charging problem.
« Reply #8 on: 27 December 2018, 16:06:05 »
Quote from: Shackeng on 27 December 2018, 14:46:53
Quote from: Migv6 on 27 December 2018, 13:28:17
Just did a quick run through with Kevins guide. Aborted first attempt as battery was so flat that electrics were doing weird things and readings started off ok but then always dropped quickly once I attached the multimeter.
Speaking of which Im using a Fluke meter at work rather than my cheap £4.99 version I use at home, so I might be doing it all wrong anyway. ::)
Changed to the spare battery I have in the boot which gave a reading of 11.75 v with engine off and no load.
Switching headlights on dropped the voltage to 11.3v

Started engine and recorded 11.08v at idle and 11.0v with engine running at 200rpm.

Doesn't seem very conclusive so far, need a fully charged battery and time to inspect wiring connections, but possibly alternator fault ?

???  2000 perhaps?

Yes.  :-[
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Migv6 le Frog Fan

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Re: Battery drain / charging problem.
« Reply #9 on: 27 December 2018, 16:07:07 »
Quote from: robson on 27 December 2018, 15:24:39
must be alternator surely :y

I think so. :y
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Migv6 le Frog Fan

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Re: Battery drain / charging problem.
« Reply #10 on: 27 December 2018, 16:45:35 »
Im a bit concerned about the half hour drive home from work tonight. Don't know if it will make it. The lights or the whole car might die before I get home.  :-\
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Nick W

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Re: Battery drain / charging problem.
« Reply #11 on: 27 December 2018, 17:03:59 »
Quote from: Migv6 on 27 December 2018, 16:45:35
Im a bit concerned about the half hour drive home from work tonight. Don't know if it will make it. The lights or the whole car might die before I get home.  :-\


MIGHT?
You expect to drive for half an hour, in the dark with an inadequate alternator?  :o

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Entwood

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Re: Battery drain / charging problem.
« Reply #12 on: 27 December 2018, 17:05:59 »
If the battery is at 11.0 volts its flat already !! I doubt it would start the car let alone drive it 30 minutes !!
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Jimbob

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Re: Battery drain / charging problem.
« Reply #13 on: 27 December 2018, 17:06:46 »
Quote from: Migv6 on 27 December 2018, 16:45:35
Im a bit concerned about the half hour drive home from work tonight. Don't know if it will make it. The lights or the whole car might die before I get home.  :-\

Ive had to do similar, aux belt tensioner let go as leaving work, made it half way home.....which meant free recovery home, (AA lent me a battery, and followed me) wouldnt have been from the office.
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Migv6 le Frog Fan

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Re: Battery drain / charging problem.
« Reply #14 on: 27 December 2018, 17:11:44 »
Ok, got two hours to put some charge in my spare but flat battery. Will do that and hope for the best.
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