# Alternator output 15V?

**URL:** <https://forums.speedlife.net/t/alternator-output-15v/212501>\
**Category:** SON240sx Automotive\
**Created:** [May 17, 2011, 9:56am UTC](https://forums.speedlife.net/t/alternator-output-15v/212501 "2011-05-17T09:56:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![R.P.M](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/r.p.m/32/5535_2.png) [@R.P.M](https://forums.speedlife.net/u/R.P.M)\
**Post date:** [May 17, 2011, 9:56am UTC](https://forums.speedlife.net/t/alternator-output-15v/212501/1 "2011-05-17T09:56:36Z")

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So I just got the SR20 running in my buddies FC RX-7 last night, starts up great, runs awesome, everything functions as it should.

Except the alternator, its producing 15v. A bit too much for my liking.

Does the 2 pin connector on the alternator need to have both wires hooked up? One is a 12v constant and the other is for the charge light on the dash. I put the 12V constant right to the output post on the alt seeing as that it is a 12V constant source.  
The charge light wire I left un-hooked.

Maybe the voltage reg inside the alt is fried…

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**Author:** ![Maverick](https://avatars.discourse-cdn.com/v4/letter/m/258eb7/32.png) [@Maverick](https://forums.speedlife.net/u/Maverick)\
**Post date:** [May 17, 2011, 12:48pm UTC](https://forums.speedlife.net/t/alternator-output-15v/212501/2 "2011-05-17T12:48:38Z")

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sounds like the internal regulator is done. New alt time!