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Transfer pump leads to the alternator, of course! 200 1990

posted by  rusteebrick on  Sat Apr 28 05:32 CST 2007
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last visit: Wed Aug 20 10:24 CST 2014
[RELATED]

I had an intermittent high-voltage situation on my '82 245. The voltage would spike without warning or apparent cause in all types of situations. All of a sudden the blower motor would race, all the lights inside and out would become extra bright, and I'd worry the whole electrical system was about to melt. Turned out the cause was loose fasteners holding the regulator and brush pack to the alternator housing. It was a little tough to diagnose while running. The alternator on the car is a rebuilt one and the screw holes may have been partially stripped during the rebuild or before. My solution was a couple of oversized, self-tapping screws installed in the Home Depot parking lot with the alternator still on the car. Now all is well, but before I got the regulator securely back on the alternator housing I'm sure I cooked off some of the battery electrolyte.

Good luck with it!






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