# Tach Signal

**URL:** <https://forums.speedlife.net/t/tach-signal/113031>\
**Category:** SON240sx Automotive\
**Created:** [February 9, 2008, 1:39pm UTC](https://forums.speedlife.net/t/tach-signal/113031 "2008-02-09T13:39:51Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![NoSkillz](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/noskillz/32/5606_2.png) [@NoSkillz](https://forums.speedlife.net/u/NoSkillz)\
**Post date:** [February 9, 2008, 1:39pm UTC](https://forums.speedlife.net/t/tach-signal/113031/1 "2008-02-09T13:39:51Z")

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Does anyone know the voltage/range for the rpm tach signal on an s13?

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**Author:** ![NoSkillz](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/noskillz/32/5606_2.png) [@NoSkillz](https://forums.speedlife.net/u/NoSkillz)\
**Post date:** [February 11, 2008, 5:57am UTC](https://forums.speedlife.net/t/tach-signal/113031/2 "2008-02-11T05:57:46Z")

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u guys suck, now i have to go dig out the multimeter and sit in my car playing with fucking wires in the cold!

and if u know anything about the ignition signal such as voltage that would be great as well

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**Author:** ![izzy\_domain](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/izzy_domain/32/5583_2.png) [@izzy\_domain](https://forums.speedlife.net/u/izzy_domain)\
**Post date:** [February 11, 2008, 11:19am UTC](https://forums.speedlife.net/t/tach-signal/113031/3 "2008-02-11T11:19:15Z")

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What do you need to find the wire for? Installing an alarm/remote starter? When I installed mine I used the tach signal wire off the ECU on the passengers side of the car. I googled it and found this. So it might be more convenient.

[http://forums.freshalloy.com/showthread.php?t=66709](http://forums.freshalloy.com/showthread.php?t=66709)

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**Author:** ![NoSkillz](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/noskillz/32/5606_2.png) [@NoSkillz](https://forums.speedlife.net/u/NoSkillz)\
**Post date:** [February 11, 2008, 12:42pm UTC](https://forums.speedlife.net/t/tach-signal/113031/4 "2008-02-11T12:42:22Z")

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yeah i know the color and stuff but im looking for the actual voltage thats applied. or even better how it changes. I need to figure a way to read rpms. if u can tell me that.  
thanks for spending time on google, im not one to ask without looking and discomfortingly i didn’t find my answer.