Can you tell me witch wire on the cluster is for the pulse for the tacho.
I guess it is in the second plug from the left - passenger side.
One of the wires in this plug is ign power.

I am changing from a standard cluster to one with a tacho in it.
It will be easier for me to tap the wire at the cluster as the ECU is in the cabin.
I know about the trim pot on the tacho to adjust the resistance to correct the signal from the coil - ECU. As I run a V8 this will need to be trimmed to suit my engine.
I have the speedo removed ready to do this task.

can you help.