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Old 05-09-2002, 05:55 PM
G-Benz's Avatar
G-Benz G-Benz is offline
Razorback Soccer Dad
Join Date: Apr 2001
Location: Dallas/Fort-Worth
Posts: 5,711
Alternator...probably internal voltage regulator or alternator diode went bad.

In any event, the earlier ones were component-replaceable. You may be looking at having to replace the entire alternator.

A charging system check would tell you a lot. With engine running and all non-essential accessories off, a check at the battery terminals should produce 13.5 - 14.4V. Outside of that range indicates a problem.

I replaced my alternator last year when I saw (and smelled) the battery venting...voltage output was 17.5V!!!

Dealer will charge $500 or more to replace the alternator...if you buy the part at FastLane, it's a DIY job at $250.
2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car
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