do i need to solder anything
If you want to do it properly, yes you do. There are other ways around getting the cluster to light up blue with a custom made gauage face that has
the blue tinge through the back of the face instead of the stock green that comes standard, but its pretty costly.... like $200 for the gauge face but you dont
have to change any globes over in the cluster. The only globes you will have to change over is the trip computer window with a Blue LED and a resistor to suit.
The heater controls are the same, they have the green tinge on the back of them that make them light up green. You can either scrape it off very gently down
to the white underlay, or leave it on as the Blue LEDs will shine enough through to make it turn blue. Unfortunately for this section, I havent been able
to find any custom dials with the blue tinge on the back of the face like the cluster.
Im yet to get around to doing this mod myself, but i eventually will do it, and I will be getting the custom made guage face (they only come in white) and suits my
car colour... and the rest just change the globes to LEDs and solder the resistors to them.
Try this thread tho, it has alot of information on how to do it. There is quite a few members here who have done it, and im sure more than happy to answer any Qs
that anyone comes across.
http://forums.justcommodores.com.au/showthread.php?t=23701
Good luck