I just wanted to post how I wired my Greddy Boost Gauge into the factory clock harness for anyone that is still trying to figure out which wire goes where.
The red gauge wire goes to the blue clock wire
The orange gauge wire goes to the red clock wire
The white gauge wire goes to the green clock wire
The black gauge wire goes to the white clock wire
With this set up the gauge only lights up when the lights are turned on and everything works perfectly.
The red gauge wire goes to the blue clock wire
The orange gauge wire goes to the red clock wire
The white gauge wire goes to the green clock wire
The black gauge wire goes to the white clock wire
With this set up the gauge only lights up when the lights are turned on and everything works perfectly.