Alternator woes....
Thread Starter
Pro
Joined: Jan 2004
Posts: 522
Likes: 0
From: Grayslake IL
Alternator woes....
Anybody have any clue as to how to properly check the rectifier bridge of an alternator for a 1974 corvette? According to the manual, mine is AFUd, but every new one I have tested is the same. The alternator is not putting out 14V, the regulator and stator and diode trio all check out to the correct readings according to the manual. I just don't get it.
Melting Slicks
Joined: Oct 2002
Posts: 2,865
Likes: 1
From: I may be getting old but I refuse to grow up
Re: Alternator woes.... (thevetterisbetter)
THe best way I found was with the bridge on the bench first fold back the straps under the nuts to isolate each diode before checking as per the manual.
Steve :steering:
Steve :steering:
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
Re: Alternator woes.... (thevetterisbetter)
I guess being an old phardt Electronics guy gives me an unfair advantage....
I just hook an oscilloscope up to the alt output stud, and look at the waveforms....tell in an instant if it's the diode pack.....
GENE
I just hook an oscilloscope up to the alt output stud, and look at the waveforms....tell in an instant if it's the diode pack.....
GENE
Thread Starter
Pro
Joined: Jan 2004
Posts: 522
Likes: 0
From: Grayslake IL
Re: Alternator woes.... (mrvette)
Gene
I did that. According to the scope it's bad. At least I think so, the entire wave was present and I was told that only the positive part of the wave should be there.
I did that. According to the scope it's bad. At least I think so, the entire wave was present and I was told that only the positive part of the wave should be there.
