I just recieved my MSD digi window switch with tach and im sorta confused about which wire should go to the soleniod. The instructions say that the grey wire is normally closed which i think means the item it is hooked up to is ON, then the yellow says normally open which i think means the item is normally off. so would i need to put the yellow into my nitrous solenoid or the gray?

these are the instructions. http://www.msdignition.com/pdf/8969_frm25515.pdf

Also would i need to splice the yellow/gray wire to go to the fuel soleniod too?

Alex

 

This is pretty crude but i think this is how it is suposed to be, correct me if im wrong!

 

they give you a diagram with the instructions, but yes the ground from the msd is your ground for the nitrous

 

So my diagram is correct?

 

On my 3rd gen i dont know which prong is the output for my RPMs on the ECU. does anyone know what prong it is?

 

I do not know which pin on the ecu for a 3gen but you can try tapping the tach wire in the dash

 

that is what i was thinking, i am going to try it on friday to see if i can get it to work because im installing the nitrous on sunday.

Anyone else know?