Need wiring patch harness and trip computer buttons.
Hi,
You will need the trip computer buttons (anywhere from $20 to just over $40), and a patch harness to get connect the fourth connector on the cluster and the trip computer buttons.
The trip computer buttons are generally simple to get hold of. The patch harness is usually the difficult bit.
First option is to source a wiring loom from a VR/VS Berlina, Calais or Statesman at a wreckers. Then a patch harness will need to be made by modifying this loom.
However, sourcing this item from a wreckers can prove difficult. I have a part number somewhere for a HSV harness that can be used to make the patch harness. RRP is about $100 for this item.
I have done the mod, and been very happy with it.
If you want to go further, PM me and I will provide more information.