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Offline Geoff30

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alternator not working
« on: February 25, 2009, 20:56:53 »
After flooding the inside of my disco at sibbertoft on Sunday I no longer have a working alternator, the batt light and rev counter both packed up after the flood.
The RAC man says that if I get the batt light working then the alternator should work again, is this right??

Also the Haynes says that the pre93 model has a fuse in the feed from the alternator where would this be as I think this could have blown since the water was up and over my seats inside the car.
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Offline JPJ

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Re: alternator not working
« Reply #1 on: February 26, 2009, 22:40:13 »
Take the connections off the back of the alternator and give them a good clean up with some emery cloth. Whilst you're there put a multimeter on continuity between the end of each cable and earth and see if you get a reading, that should tell you if a fuse has blown. Other than that it's probably a new alternator. Mine was on its way out and eventually conked out. Sounds rough when you listen to it and no rev counter or battery light.
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Offline Les Henson

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Re: alternator not working
« Reply #2 on: February 27, 2009, 08:47:07 »
If the water was very muddy, then the brushes may be stuck (try soaking the back of the alternator with WD40 or similar).
The regulator may have failed, so it might be worth getting it repaired, rather than buying a new alternator.
Do the test as JPJ says, then see what you find.


Les.
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Offline wizard

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Re: alternator not working
« Reply #3 on: February 27, 2009, 12:36:35 »
Take the regulator off and then clean it out.
The regulator is the black(or silver) box held on the back of the alternator by 3 small screws.

wizard
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Offline GreedyGibson

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Re: alternator not working
« Reply #4 on: February 27, 2009, 17:46:30 »
I have had this happen several times after going through (muddy)water and it has always turned out to be the regulator sticking. They can be found on ebay for about £10, http://cgi.ebay.co.uk/NEW-12V-REGULATOR-FOR-LUCAS-A127-TYPE-ALTERNATOR_W0QQitemZ300281177799QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item300281177799&_trksid=p3286.c0.m14&_trkparms=72%3A1121%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318 To take them out is 3 5.5mm bolts, i found when putting them back you need to use a paper clip straightend out through the little hole to hold the brushes back or they break  :doh:.
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Offline Geoff30

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Re: alternator not working
« Reply #5 on: February 28, 2009, 21:01:35 »
Many thanks for the replies, have done some tests and seems it is the alternator at fault, ordered one off flea bay, think might try getting new module as well and see if I can repair mine so I always got a spare.
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Offline hodgei

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Re: alternator not working
« Reply #6 on: March 01, 2009, 21:42:17 »
I would be seriously worried if an RAC man says that fixing a battey indicator light would get an alternator working  :shock: The light is an indication of whether the alternator is working - not t'other way round...


Just had to replace my alternator - funny clunking sound in the engine bay and a loss of power - turned out the front bearing on the alt had failed and siezed up and jammed the drive belt... 8-[


Still, all working now...
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Offline Geoff30

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Re: alternator not working
« Reply #7 on: March 01, 2009, 22:01:57 »
Quote from: hodgei on March 01, 2009, 21:42:17
I would be seriously worried if an RAC man says that fixing a battey indicator light would get an alternator working  :shock: The light is an indication of whether the alternator is working - not t'other way round...


Just had to replace my alternator - funny clunking sound in the engine bay and a loss of power - turned out the front bearing on the alt had failed and siezed up and jammed the drive belt... 8-[


Still, all working now...


That was my main worry, never trusted any recovery people really. Since one messed up all my fueling on an XR4i.
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