Ground connections:

D1,D3,A1,A6,A8,A10

Positive Connections:

D5,C16,D16

Display will do a self check for 2 seconds after power up. If the screen is black and not coming on, you might have a problem with the power feed to the backlighting

Note: If you can see the background RPM, MPH and color areas on the gauge area with nothing on, that means the LCD Film needs replaced

http://batee.com/corvette/dcrg/services/lcdkit.html