I've got an Autometer pro shiftlight and I need to know what wire to tap into for the signal wire. I tapped into the white wire on the red connector on the ECU but it wouldn't work. I thought that was the right one but I guess not. Anyone know for sure which one it is? Thanks. OH yea, for a 94 Z

 

I just hooked up to the white wire in the passenger side (inside the kick panel).