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- - Alternator - bad diode ? (http://forums.pelicanparts.com/porsche-911-technical-forum/76685-alternator-bad-diode.html)

ischmitz

08-06-2002 08:55 AM

Alternator - bad diode ?

Folks,

the image shows a scope trace of the D+ vs. ground on my 74 CIS 2.7. The full story can be found here: Alternator question

http://www.di.com/home/ingo/alt_dplus1000.jpg

Engine @1000RPM: 1000RPM*1.3*6/60 = 130Hz

Do I have a bad (open) diode. Can someone tell if its the D+ B+, or ground diode pack? My alternator is the Motorola style with external regulator.

Ingo

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