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Alternator Problems

posted by  B.C. on  Fri Feb 27 19:50 CST 2004
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last visit: Wed Mar 28 22:28 CST 2012
[RELATED]

At 100,000 miles my 1988 240 was in dire need of new brushes. The brush/regulator unit is around $80 from a dealer, maybe less from an on-line place like fcpgroton. Lot less than another alternator.

Before replacing the alternator, I would remove and clean and re-connect all the wires to the alternator (there are three) and then check results. If still bad, I would replace the brush/regulator unit.

If it's still the alternator then swap the old brushes into the old alternator before "trading it in". May a well have a known good spare.

Brush failure due to wear-out (to below 5mm long) is much more likely than alternator failure, IMHO.

Good Luck,

Bob

:>)






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