Thread: Is there a way to tell if I need an alternator or the voltage regulator?
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Old 07-26-2017, 02:38 PM
ChrisArnt ChrisArnt is offline
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Join Date: Dec 2009
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Quote:
Originally Posted by tjts1 View Post
Is this with or without the +0.5v correction?

96-97 E300 has an undersized 90a anternator that can barely keep up with the loads from afterlow, electric fan, electric everything. A lot of us have swapped 115/120/150a used alternators with OAP pulley off of other MB models. I would put a bigger alternator on it but the fact that your voltage drops as the car warms up and revs increase tells me your VR is on its way out.
I did not add the 0.5 volts.
The multimeter read 12.5.

What do you think about the WIDE OPEN THROTTLE ERROR CODE 462?
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