Tacho connection to dash

[Mordred]

If you have the test socket in the engine bay you can link two of the pins and have the sense wire for the coil appear in the 8 way connector above the fuse box. Link pin 13 and 5 in the connector with a piece of wire making sure the grey/green is connected at the coil. In the 8 way above the fuse box there is a blue white that doesn’t have a matching wire leaving (used for the rear window defogger circuit which isn’t fitted in Aus cars) and you can link to that and take it to the tacho. All other wires should connect locally. Saves running another wire to the rear. 

Adrian