Both of my SD's are now not charging. They both have had new regulators put in them, with no difference. One was a Hella, the other a Bosch. Now the Hella unit had an installation sheet that mentioned having to polarize the regualtor first, with no other instruction on how to do that.

I believ this involves shorting the B and D terminals on the regulator, but the regulator is internal so I don't think this can be done. I also heard this can be done by shorting the field to battery. With the internal regulator and the plug-in harness, I don't know where to access any of these.

Anybody know? Has anybody had to polarize a regulator before?

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Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)