Im going to wire up my summit switch tomorrow. I right now have a broken harlan switch which is connected to a relay. Now can I wire up the summit one with the reply or no? Where does the yellow and grey wire go 2?

 

do you mean relay if so no you don't need a relay just the summit rpm switch,ac delco vacuum solenoid,vacuum canister with built-in check valve and hoses.

http://forums.maxima.org/showthread.php?t=335310

http://forums.maxima.org/showthread.php?t=217001

http://forums.maxima.org/showthread.php?t=347286

http://www.cyberhub.net/manifold/