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Headlights dim...

Started by 1980sdga, 01 April 2011, 07:25 PM

1980sdga

I took the car to work this AM and it involved a couple of hours of early morning driving through the darkness.

It was awesome!

Anyway...  I noticed the headlights getting dimmer and brighter as I was driving at a constant speed. Engine RPM didn't seem to affect it and the alternator seems to be charging OK because it started fine this afternoon.  It was actually pretty subtle.

Any ideas?  Ground?  Contact at the voltage regulator?  Anyone else had this issue?

Big_Richard

constantly fluctuating running voltage will be the alternator regulator.

jbrasile

1980sdga,

Yep, voltage regulator is going bad. They are pretty easy to replace right behind the alternator.

MB P/n is 002 154 58 06 if you have alternator 004 154 18 02 or 002 154 72 06 if you have alternator 005 154 74 02 or 005 154 98 02. Bosch makes both the alternator and regulator

Tks,

Joe

1980sdga

Thanks guys!  I actually found a tutorial on youtube outlining R&R of the regulator.  Pretty informative vids!