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Once the dash bezel was back on, Spector got underneath the dash to install the wide-open throttle switch. The switch operates in a similar manner to the brake-light activation switch in that it's positioned behind the main post of the pedal. When the throttle is planted wide open, the post pushes the plunger of the switch in and activates the nitrous system if the circuit is complete and the power switch to the system is on. Once the switch was in place, Spector ran the wiring to the engine bay, and then he and Lacko teamed up to make sure that when the truck was at wide-open throttle, the switch was working.