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-   -   alternator problem (http://forums.pelicanparts.com/porsche-996-997-991-forum/1030612-alternator-problem.html)

neadaporsh 05-26-2019 01:11 PM
alternator problem
 
when my battery is fully charged and the engine is cold the alternator is putting out 14.2 volts. As the car is driven and the temp goes up the output of the alternator goes down to about 13 volts and the battery loses charge.....any idea where the fault lies???????

rbogh901 05-29-2019 04:29 PM
thinking the y cable is one place to check. let us know what you find.

RRacer 05-29-2019 08:21 PM
I second the y cable. I just replaced one today that was corroded.

JFP in PA 05-30-2019 07:22 AM
Quote:
Originally Posted by neadaporsh (Post 10471573)
when my battery is fully charged and the engine is cold the alternator is putting out 14.2 volts. As the car is driven and the temp goes up the output of the alternator goes down to about 13 volts and the battery loses charge.....any idea where the fault lies???????
I wouldn't be replacing anything until you run voltage drop tests to make sure it is the cable. If the cables are OK, I would check the voltage regulator.


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