# testing alternator while in car

**URL:** <https://forums.speedlife.net/t/testing-alternator-while-in-car/248617>\
**Category:** Shift518 Automotive\
**Created:** [November 25, 2009, 7:48am UTC](https://forums.speedlife.net/t/testing-alternator-while-in-car/248617 "2009-11-25T07:48:21Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![Shady](https://avatars.discourse-cdn.com/v4/letter/s/6de8d8/32.png) [@Shady](https://forums.speedlife.net/u/Shady)\
**Post date:** [November 25, 2009, 7:53am UTC](https://forums.speedlife.net/t/testing-alternator-while-in-car/248617/5 "2009-11-25T07:53:26Z")

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> [@Hottest Acura Ever?](https://forums.speedlife.net/t/hottest-acura-ever/26330/14):
>
> how can i do this?
> 
> i called pepboys and they say they have a scan tool that will run through the whole system. but i find it hard to believe that it will target the alternator specifically.
> 
> thoughts?

From in the car all the will be able to tell you is volts…

Theyd have to put a battery/altenator tester hooked up to the battery and put a load o nthe altenator to see if its bad or not

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