Russ
Part of things
Posts: 372
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I have a problem with a Corsa 1.7d (isuzu engine). Basically the alternator died, and i replaced it with a good second hand one, everything was fine for 2 days (alternator charging, read 14.2v at battery etc), then on the way home the ignition warning light comes on and it cuts out. I fully charged the battery and started the car up, now when the engine is idling the alternator it not charging but when you rev the engine or hold the revs at 2000 rpm+, the alternator starts to charge, when you let the engine idle again after, it stops charging and the battery starts to drain. I've checked all the connections and cleaned them, checked drive belt tension, checked for blown fuses, checked the relays etc but nothing makes any difference.
Anyone have any other ideas/things to check?
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Does the charge warning bulb on the dashboard work? The bulb forms part of the charging circuit, so if blown will produce odd results as the alternator will not be receiving the 12v feed to generate a field.
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1986 Panda 4x4.
1990 Metro Sport.
1999 Ford Escort estate.
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Russ
Part of things
Posts: 372
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Yes the bulb does work.
Just been having another look at it. There's a 2 pin plug that plugs into the alternator, i swapped this over for another one, everything started working again and had 14v at the battery, then 5 mins later the alternator stopped charging and i'm back to square 1 again...
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bortaf
Posted a lot
Posts: 4,549
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if the regulator goes in the alt they do only charge over 2000 revs, i recon the alts gone again ?
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R.I.P photobucket
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barty
Posted a lot
Posts: 1,088
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so the moral of this story is to get a good alternator lol
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bortaf
Posted a lot
Posts: 4,549
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The thing is how well was the SH one stored, if they get water or damp in em they corrode and that shortens thier life concidrably, keep, em dry and they'll last?
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R.I.P photobucket
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ChasR
RR Helper
motivation
Posts: 10,194
Club RR Member Number: 170
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Battery charging problemChasR
@chasr
Club Retro Rides Member 170
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Indeedy!
Recently I used to only use secondhand alt that were genuine after having a spate of alternators (namely on BL cars and a MkIV XR3i) where the pattern alts used to behave and die in a strange manner (dad's XR3i went through 3-4 alts in 3 years, oddly enough the 'new' alt on the XR3i I owned did not last long (but the SH item did) and the 'B's Unipart 'Silver' alternator would either charge at 13V and would stop charging as soon as 13v was reached (but start again once it dropped to 11.5V (until one day where it refused to charge full stop!).
New OEM branded alts so far I have been OK with and SH genuine items.
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Russ
Part of things
Posts: 372
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I think i might buy a new one and see how that goes, as there's nothing else i can see thats wrong now.
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If you've got a multimeter, pull the alternator to pieces and check the rectifier, usually a diode that has gone if it's only making power at high revs.
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1994 Rover Metro
1994 Peugeot 405 Estate
1991 Rover Metro Gti 16v
2001 Fiat Seicento Sporting
1999 Fiat Punto 1.2
1994 Peugeot 106 Xnd (x3)
1991 Westfield 7
2004 Landrover 110 SW
2003 Seat Ibiza 1.9Tdi Sport
1959 Ford 107e Prefect
1992 Suzuki Vitara
2008 Skoda Fabia
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