Window switch as said above, or get the autometer RPM activated module used for installing a shiftlight onto a stock tach.
And the time to run the car isn't very rare for me...I'm always in the throttle and bangin gears
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2015 Ford Mustang GT Fastback - Ingot Silver - 6M - Performance Package - Gibson Catback, JLT CAI, FR 47lb injectors, BAMA E85 tune, Eibach Sportline, BMR wheel hop kit, UPR oil separator, Steeda shifter bushing/bracket
Team B.O.B.® - Ballaz on a Budget