# 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:** 10

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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, 8:32am UTC](https://forums.speedlife.net/t/testing-alternator-while-in-car/248617/10 "2009-11-25T08:32:44Z")

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> [@RANT re: Cops](https://forums.speedlife.net/t/rant-re-cops/26272/102):
>
> just went outside with a multimeter and…
> 
> everything off, the new battery reads like 12.37v
> 
> car on with lights on and radio blasting, the battery reads 14.18v
> 
> i think im good.
> 
> thanks for nothing shift.

That works just fine…

The only thing the pep boys one does is just put a huge load on the altenator to see if it dies under a big load…

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