Your gonna need a L.E.D light from radioshack with 2 wires coming out the back(one for + the other for -) Ground the - wire to any metal on the chassis and run the + to the VTEC solenoid wire itself(i believe it's green/white). Now when you hit VTEC, the light will light up. You actually have to drive the car to engage VTEC so you just can sit in the driveway and rev it to whenever your VTEC kicks in...you have to be moving.