rpm sinal wire????

[boost90]

I just bough this shift light for 1990 turbo supra and don't know where to find the rpm signal wire. it has three wire red, black, and green. can someone tell me where I can hook up the green wire too? thanks

 

[mkiiichip]

The tach wire goes from the ignitor (under the hood), through the ECU area, then to the tach on the dash. Depending on where the rest of the wiring is, would determine where you get the signal.

 

[boost90]

thanks... I found out that we can use the IG- on the diagnos box to get the signal...

 

[mkiiichip]

Yep, that's the one.