I'm a little confused with the wiring of the Greddy EGT I have.
The black wire is for ground, white to the park lights power, here's where I get confused.
Red is 12V power: Is this hard wired to the battery power or 12V switched power.

The Orange wire says ignition: where does this wire go?

I like greddy products but every time I buy something it comes with shitty photocopied directions that are half japanese!!!

 

Ignition (orange) should mean 12V switched.

The 12V (red) should be 12V (fused) that has continuous power (not switched via ignition).

I think that is how my other GReddy gauges have been.

 

yep that is right