I recently bought an MSD window switch from a friend, but it came with no directions. It's already been installed on an LS1, so the LS1 modifications are done already. I understand the white wire is the tach wire, I'm guessing the black wire is the ground, now where do the red and yellow wires go? Is red battery and yellow to the nitrous solenoid relay?

 

Here ya go...

 

You rock!

Thanks for the quick reply. I may go put this in now for lack of anything better to do on this beautiful day