so i got my first nitrous kit and i am putting in a window switch but dont no what wire i hook it up to on the truck or on the kit. it is a zex silverado kit and its a on off msd window switch all the help would be great

 

It goes on the ground side of the solenoid circuit. i think there is a yellow wire (ground for the noid. Black wire (ground for the window switch). Red (12v for the windows switch). White wire (tach signal for the window switch). This is just by memory. you can look up the directions from msd's website as well.

Dustin

 

you will need a relay to use the MSD window switch for the Zex kit.