Speed Convertor Chip Wiring Help Needed

[The Kev]

Hi everyone,

Ok I am new here, I have been searching the internet for the past week now with little or no success. I have a 92 GT-R ST182 import (JDM).

I have got one of those speed converter chips off eBay, it has four wires on it, black, red, grey and yellow.

Now I found a posting on another club that says you connect as in the pic below -

Now I have a small issue as to what wire does the yellow one connect to??

It goes to the speed sensor on the back of the clocks (on the loom thing) but I have no idea as to which wire it is.

Please someone help me out here!

Many thanks, Kev.

[GTForbes]

you'll need to get the wiring diagram for your car the cut the wire from the loom and attach it to the convertor. it's been years since i've had to do it so can't even remember where i got my info to do mine, try the link in my sig and see if it's there