Help... i dont understand were the two output wires (gray/yellow)comming from the window switch goto. in the instructions it says

grey: normaly closed. this wire will remove the ground source at your desired ON rpm, and comlete the ground circuit at the set OFF rpm

yellow: normaly open. this wire will provide a ground source at your desired ON rpm, and remove the ground at the set OFF rpm.

so Yellow=supplies ground Gray=removes ground

so i attatch the ground wire from the nitrous selenoids to the yellow and the gray to a ground?

thanx for the help in advance. i feel dumb because i wired the whole system up and cant figure out this little black box.

 

Ground your solinoids as you would and run your hot wire thru the yellow wire.