MPS and MSD window Switch, need help!

[BLACK051K]

    Need info, Please!

    Installed MPS fast fi to secondaries,keeping PC connected to Primaries. Have an MSD window switch applying ground at 8k and removing ground at 11.5k to N20 selenoid.     Power to N20 selenoid is supplied via WOT switch.

Mps unit is  ....Red to 12 volt on   (ignition)
                ....Black to ground    (msd  switch would add or remove this ground wire)
                  ....Yellow/red  to N20 selenoid + wire ( instant rich  trigger/signal )

My question is....... Can i also wire the ground from MPS unit to Msd window switch to add/remove ground to MPS unit , therefore Turning  ON and shutting OFF N20 along with MPS fast FI? at preset Window Switch RPM's.

Once Yellow/red and Red have power going to them can system activate/work by supplying ground to activate?    or    Does MPS unit Ramp up/memory, to work........with +12v. and Ground.



                                                        Thanks, Rick

[DaveO]

Rick,

Use the gnd from the window switch to trigger a relay which will put 12v to the MPS FI box to trigger it.

Dave

[BLACK051K]

Dave,

                   Got it ...........


                                           Thanks!  Rick