Likely One or more Diodes in the Rectifier have problems.
Most ACdelco parts only have 30-90 day warranty. Go check and if possible return under warranty.
If not... I use AZ parts w/ lifetime warranty that just need phone # to track in the system. IOW you won't need a receipt months to years later if have problem again.
alt should be above 14v, close to 15vdc.
|Originally posted by Rexgirl:|
Ripple: your alternator is producing 0.2 volts of AC on top of 13.5 to 14 volts DC.
close enough but may not quite right.
1 diode dead means 1 or 2 stator winding is "dead" and can cause a volt drops on alt's output and big noise problem.
SI CS and most other alt's are 3 phase AC generator w/ 3 phase "full wave" rectifier to output DC.
SI and some others are infamous for shorted diodes... when so does get AC on the output term, way more then 0.
2v, and quickly kills the battery and more.
CS often fails w/ open diodes not shorted diodes and shouldn't see real AC when rectifier dies.
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