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jimkav's picture
VBMWMO #8868
Joined: 04/03/2013
Posts: 120

terminal 61 on outside of gen puts out 5 1/2 to 7 1/2 volts pending RPM
terminal 51 puts out 5 1/2v regardless of rpm
seems like whoever rebuilt the gen flipped the two wires inside?

my guess is battery wired to terminal 51 is draining battery and not charging.

Mike Goldthorpe
Mike Goldthorpe's picture
Joined: 07/26/2011
Posts: 68
I think the same principles

I think the same principles outlined here apply - google Understanding And Maintaining The BMW /2 Electrical System and go to page 14. Should give you hints.


One of the few R50 owners in New Zealand

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