the first position to the second position the lever 22 and pin 14 rotate relative to the pedal 14 in a preselected direction such that the angle theta increases in magnitude rotation of the pin 24 causes the movable wiper 54 to rotate along the resistive strip 58 between first and second positions corresponding to the pedal first and second positions respectively the movable wiper 54 effectively forms a short circuit from the resistive strip 58 to the conductive strip 64 therefor the entire conductive strip 64 has a dc voltage potential correlative to the position of the wiper 54 on the resistive strip 58 thus the potentiometer 52 delivers a dc voltage signal over the wire 68 responsive to the conductive strip voltage potential the conditioning circuit 66 receives the dc voltage signal from the potentiometer 52 and produces a pulse width modulated signal having a duty factor responsive to the dc voltage signal because there is no appreciable distance between potentiometer 52 and the conditioning circuit 66 the effects of electromagnetic interference on the analog signal delivered to the conditioning circuit 66 are negligible additionally in the event that electromagnetic interference or wiring harness degradation change the frequency or the dc level of pulse width modulated signals produced by the conditioning circuit.