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Old 04-28-2017, 04:41 AM   #8
alm001
01101
 
Join Date: Jul 2015
Location: CT
Posts: 587
Quote:
Originally Posted by Steve Tinker View Post
With the engine running above 1000rpm, you should see a 13.5 - 14.2v (depending on the battery state of charge) @ the battery terminals. Anything lower than that and the charging system is suspect.

Deciding if the problem is a faulty alternator or a voltage regulator will require a bench test of the alternator.
Last night I had to move the car so I put the meter on the windshield and revved it up 1k, 3k, 4k... doesn't matter 12.xx V

I heard pepboys/autozone can't bench these alts. Is that true?

Quote:
Originally Posted by Gelbster View Post
Don't overlook the infamous "Y connector" and corrosion under the insulation of the battery cables.Search has more.I linked a Bosch Alternator rebuild video recently.UD pulley gets mixed reviews.
I recently did my heater core and removed the battery for access, all the cables are clean and appear to be in good shape.


I had to drive the car to work today (long story with backup car) and we're down to 11.9v running when I arrived.
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