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The MSD window switch works by supplying a ground to your fuel and nitrous selnoids (sp). The black wire goes to ground. white goes to #10 pin on the ECU. One goes to the ground wire of you selnoids. and one is 12 V.
You want to cut both wires. This will put it in 4 cyl operation. #10 pin controls 4 cyls. What 4 I don't know.. Hope this helps.. If you need more info contact me..
MSD window switch is rated for 1.5 amps. Never use MSD window switch for ground on your N20 and fuel solenoids. Your MSD window switch will not last long;)
Use MSD window switch ground for low elecrtrical load devices only.
Fuel Pressure Safety Switch, if you have one works out great, also main N20 relay draws very little electrical load. http://www.ls1.com Nitrous section. From time to time has posts were N20 installers used MSD Window switch, to ground solenoids and burned up MSD window switch:(