Hi, i'm trying to find the negative side of the coil on a 95 2.2 Prelude so i can wire a RPM monitor to it, does anyone know where the best place is to pick this up? I've read some people say you can get it from the ECU but i don't know the PINOUT config of the ECU. Any ideas anyone?

 

What RPM monitor device are you actually trying to install? Well heres a pinout for the RPM signal on the ECU...

 

I'm fitting a clifford remote start system that needs to monitor the RPM. That image helps loads, thanks mate.