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Strange Illuminations, Part 2 200

posted by  Volvodad on  Thu Dec 9 12:23 CST 2004
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last visit: Thu Oct 23 16:18 CST 2014
[RELATED]

Low hassle alternator test: remove belts and spin it by hand...if it turns freely without noises, it is probably in decent shape mechanically and does not need a rebuild, so the brush/regulator purchase is lookin' good.

More hassle: remove alternator and take it to one of the (many) places that offer a free test. This may confirm bad brushes/regulator or perhaps a diode problem. They will try to sell you one of their units: resist, unless you feel inclined to throw down the cash for a reman Bosch. While it's out of the car, pull the regulator and brush assembly from it and check brush length. I can't remember what the minimum should be, but you can search archives here for that. If brushes are below spec you have likely found the problem and also the cheap fix.
--
Bob (son's 81-244GL B21F, dtr's 83-244DL B23F, 'my' 94-944 B230FD; plus grocery-getter Dodge minivan, hobbycar 77 MGB, and numerous old motorcycles)






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