Dead battery - Is the alternator bad? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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Dead battery - Is the alternator bad?

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09-08-2013, 07:16 AM

#23

dghii

Registered User

Join Date: Sep 2008

Location: Florida

Posts: 2,497

Quote:

Originally Posted by Ian c

Ahhhh ....
The good old "diagnose with your wallet" theory

No. A 3 time Boxster owner who had the EXACT same problem 3 months ago and who fixed it after diagnosing the problem.

You want to verify you have a bad regulator? Get an oscilloscope and look at the output of your alternator. You'll see that you're missing (at least) one of your diodes.

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