Those symptoms indicate a failed regulator that's not reducing the field
current to maintain the target output voltage.  Cheap and simple fix, but
don't delay too long or you'll cook the battery.

Scott Ritchey
Kittrell NC
1982 300SD 220K
1979 300TD 350K


-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Peter Frederick
Sent: Thursday, December 29, 2005 12:33 AM
To: Mercedes Discussion List
Subject: Re: [MBZ] Alternator light


Hmm, now that's interesting, as the light is brighter at high rpm and
nearly goes out at idle!

Quite the opposite of the normal worn out brushes behavior (I've had
Bosch alternators for quite a few years now, staring in 1978....)

Overvoltage makes me think of a loose wire.  Will have to check
tomorrow.

Belt tension is fine (checked that first thing, I've had the tensioner
spring break), and I think the fuses are all good.

Peter


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