# screwed up tach

**URL:** <https://forums.speedlife.net/t/screwed-up-tach/104449>\
**Category:** SON240sx Automotive\
**Created:** [March 13, 2007, 8:28am UTC](https://forums.speedlife.net/t/screwed-up-tach/104449 "2007-03-13T08:28:54Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![S13GG](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/s13gg/32/5506_2.png) [@S13GG](https://forums.speedlife.net/u/S13GG)\
**Post date:** [March 13, 2007, 9:50am UTC](https://forums.speedlife.net/t/screwed-up-tach/104449/4 "2007-03-13T09:50:55Z")

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> [@i'm new](https://forums.speedlife.net/t/im-new/11631/21):
>
> I know the tach signal comes from the dizzy or something. Whats a realatively simple way to check to see if the wiring to the dizzy is screwed and how do I fix it? Keep in mind that I’m weaksauce with the wiring. Thanks.

this ^ is what I was refering to.

Unfortunately I cannot tell you where the RPM signal is taken from. Just that its my understanding that the 2-pin plug on the diff gives an ABS signal…

Did I sell you a VLSD? if I did, it was non-ABS IIRC

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