# STRI Digital Tach Install? **URL:** \ **Category:** SON240sx Automotive\ **Created:** [November 23, 2008, 11:24am UTC](https://forums.speedlife.net/t/stri-digital-tach-install/120067 "2008-11-23T11:24:43Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![danbikes](https://avatars.discourse-cdn.com/v4/letter/d/f9ae1b/32.png) [@danbikes](https://forums.speedlife.net/u/danbikes)\ **Post date:** [November 23, 2008, 11:24am UTC](https://forums.speedlife.net/t/stri-digital-tach-install/120067/1 "2008-11-23T11:24:43Z")
I just recently picked up an STRI 60mm Digital RPM gauge to replace my stock '90 KA-E one which no longer works with my redtop SR. I was told by the person that sold it to me that it would work by just tapping into an RPM signal off the ECU, which makes sense to me. However, I so far, have tried looking up countless sr20 ECU pinouts looking for the tach wire, and have found a few conflicting answers… some say that it’s pin # 2, some say pin #3, but i tried both of these so far, as well as pin #1, but none have been correct… Pin #1 and 2 have given me at least some form of response, but definately not the true RPM readings, and Pin #3 has given me nothing… I was just wondering if anyone could tell me which wire to tap into to get a proper reading for my tach… Thanks in advance, Dan. ---
**Author:** ![danbikes](https://avatars.discourse-cdn.com/v4/letter/d/f9ae1b/32.png) [@danbikes](https://forums.speedlife.net/u/danbikes)\ **Post date:** [November 23, 2008, 5:30pm UTC](https://forums.speedlife.net/t/stri-digital-tach-install/120067/2 "2008-11-23T17:30:33Z")
nobody?.. ☹ i miss having a tach lol… ---
**Author:** ![JamesS](https://avatars.discourse-cdn.com/v4/letter/j/87869e/32.png) [@JamesS](https://forums.speedlife.net/u/JamesS)\ **Post date:** [November 23, 2008, 6:19pm UTC](https://forums.speedlife.net/t/stri-digital-tach-install/120067/3 "2008-11-23T18:19:37Z")
You need to download a FSM for the Redtop SR20DET motor. It will tell you all you need to know. ---
**Author:** ![danbikes](https://avatars.discourse-cdn.com/v4/letter/d/f9ae1b/32.png) [@danbikes](https://forums.speedlife.net/u/danbikes)\ **Post date:** [November 23, 2008, 7:02pm UTC](https://forums.speedlife.net/t/stri-digital-tach-install/120067/4 "2008-11-23T19:02:16Z")
well, theres only one problem with that… i can’t read japanese, and there is no english S13 redtop SR20DET FSM to my knowledge… ☹ ---
**Author:** ![danbikes](https://avatars.discourse-cdn.com/v4/letter/d/f9ae1b/32.png) [@danbikes](https://forums.speedlife.net/u/danbikes)\ **Post date:** [November 24, 2008, 9:53am UTC](https://forums.speedlife.net/t/stri-digital-tach-install/120067/5 "2008-11-24T09:53:42Z")
bump? ---
**Author:** ![JamesS](https://avatars.discourse-cdn.com/v4/letter/j/87869e/32.png) [@JamesS](https://forums.speedlife.net/u/JamesS)\ **Post date:** [November 24, 2008, 10:34am UTC](https://forums.speedlife.net/t/stri-digital-tach-install/120067/6 "2008-11-24T10:34:33Z")
[http://www.innovatemotorsports.com/resources/1991\_1995\_Nissan\_180SX\_SR20DET.php](http://www.innovatemotorsports.com/resources/1991_1995_Nissan_180SX_SR20DET.php) ---
**Author:** ![KoukiS14](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/koukis14/32/5522_2.png) [@KoukiS14](https://forums.speedlife.net/u/KoukiS14)\ **Post date:** [November 24, 2008, 10:19pm UTC](https://forums.speedlife.net/t/stri-digital-tach-install/120067/7 "2008-11-24T22:19:50Z")
Dan, Like I said you need to tap into your SR tach signal so make sure you have the right wire first. If that doesnt work then I would look into your speed sensor and make sure that its working because if thats not working then it means that your ECU is seeing zero rpm. ---
**Author:** ![danbikes](https://avatars.discourse-cdn.com/v4/letter/d/f9ae1b/32.png) [@danbikes](https://forums.speedlife.net/u/danbikes)\ **Post date:** [November 25, 2008, 9:05am UTC](https://forums.speedlife.net/t/stri-digital-tach-install/120067/8 "2008-11-25T09:05:00Z")
yea, like i said in my first post, i tried Pin #3 (yellow/red stripe wire) on the ecu (which is described as “Tachometer signal”), no dice… if i didn’t have my speed sensor working/hooked up properly, wouldnt i also not have a working speedo, or is that something different? I’ll try hooking up my multi-meter to #3 and see if theres any voltage there as well later on… ---
**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:** [November 25, 2008, 1:57pm UTC](https://forums.speedlife.net/t/stri-digital-tach-install/120067/9 "2008-11-25T13:57:08Z")
signal wire and ground were used? ---
**Author:** ![KoukiS14](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/koukis14/32/5522_2.png) [@KoukiS14](https://forums.speedlife.net/u/KoukiS14)\ **Post date:** [November 27, 2008, 11:03pm UTC](https://forums.speedlife.net/t/stri-digital-tach-install/120067/10 "2008-11-27T23:03:54Z")
Im retarded, I meant to say RPM signal not speed sensor .Once you figure out your ecu pinout ensure that your rpm signal is working by hooking up a volt meter and watch for increased voltage as the rpm goes up. Hope that helps