GoldenVelvet

I think I already know the answer, but.

How do I hook up the rpm signal for an MSD RPM switch?

Can I use the tach signal?

JeremyF

iTrader: (23)

Yes tach signal, white wire i believe. Hope this helps.

Jeremy

NoGo

iTrader: (2)

Look up which wire it is going to be off of the PCM from the other website (LS1.com) depending on what year car you have. After that just make sure you follow the MSD directions, find a good ground, and don't hook the power supply directly to your battery because it will slowly drain your battery over a couple days.

Good Luck