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Originally Posted by free300e
wouldn't a bunk regulator allow the voltage to spike? if the alternator was charging of course. I learned how to check regulators too, my fault for throwing away the handouts. I will try and look it up, I would rather rule out all the possibilities before making any purchase commitments. then again I do need this car running asap.
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It's usually not the regulator that fails...it's that the brushes wear out. The regulator and brushes come as an assembly.
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1989 300 SEL that mostly works, but needs TLC
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