hey guys, i got an Autometer Pro-Shift shift light the other day and need to know what the green wire on the shift light goes to. Its going in a 240sx with the S14 SR20 blacktop swap. Not sure if that matters or not. But i figure it goes to the Tach lead wire, i just dont know where that is on a 240. Any help would be greatly appreciated! Thanks (the more details on where exactly it is at under the hood, the better .

Brandon

 

usually you connect to a constant power source and then find the wire for the tach and a ground then boom done.

 

Yea thats what i figured, i just dont know where the tach wire is at...

any ideas?

 

 

^ where did yo uget that?

 

I dont know if it is different for a blacktop SR or not, but on my redtop i had to buy a tach adapter to convert the signal of the SR to the type of signal that Autometer uses in all their insturments. if i hooked my Autometer tach up to the factory tach output on the ecu the tach wouldn't work.

 

Awesome! Thanks Joel for the diagram, thats all i needed. Just hooked up the wire to the RMP wire on the ecu and tada, works great!

 

How I got my tech meter done was, I hooked up to the crank angle sensor, using the white wire. That works better.

 

http://www.apexi-usa.com/support_wiring.asp this site

 

ok, so if i'm hooking up an autometer tach, which diagram would i use for an 89 240sx coupe? It has a blacktop s13 sr20det.....
An also, the diagrams above are for the ecu plug? or for the plug in the dash?

 

for the blacktop u use n3-d but it doesn't really matter because its the same setup as the other sr motors i believe. and this just shows where to put the rpm wire from ur tach to the ecu

 

ok nvm i take that back about them being the same i just took a look at the diagram, do u know what year ur motor is?

 

no i dont know, all i know is that its a blacktop sr from an s13.

 

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