Abstract: A control head for remote actuators on a vehicle heater/air conditioner system comprises variable resistors operated by control knobs to provide variable motor control voltages to the actuators which comprise servo-actuators or a pulse width modulated blower motor. The control head has a molded plastic housing with embedded conductive runners terminating in wipers. A control disk rotatable with each knob has an arcuate resistive film and a pair of arcuate conductors connected to ends of the film. The wipers engage the arcuate elements to apply a supply voltage to the conductors and pick off a control voltage from the resistive film. Alternatively the arcuate elements are on the housing and the wiper is on the control disk.