Right Multi-Function Switch

Fig. 19 Multi-Function Switch:

The right multi-function switch is located on the right side of the steering column. The only visible components of the right multi-function switch are the control stalk and control knob that extend through dedicated openings in the right side of the steering column shrouds, just below the steering wheel. The remainder of the switch, its mounting provisions, and its electrical connections are all concealed beneath the steering column shrouds. The switch housing and controls are constructed of molded black plastic. The right multi-function switch is secured by two screws to a mounting housing that is integral to the left multi-function switch.

The right multi-function switch control stalk has both white nomenclature and International Control and Display Symbols graphics applied to it, which clearly identify its many functions. On the end of the control stalk is a plastic control knob with a rounded end and a flattened face to allow it to be easily rotated. A single connector receptacle containing six terminal pins is integral to the back of the switch housing and connects the switch to the vehicle electrical system through a dedicated take out and connector of the body wire harness. The right multi-function switch cannot be adjusted or repaired and, if faulty or damaged, it must be replaced.

The right multi-function switch is the primary control for the front wiper and washer system, and contains switches, circuitry, an intermittent wipe logic circuit, and an internal wiper motor relay to provide the following functions and features:

- Continuous Front Wipe Modes - The internal circuitry and hardware of the right multi-function switch control stalk provide two continuous front wipe switch positions, low speed or high speed.

- Front Washer Mode - The internal circuitry and hardware of the right multi-function switch control stalk provide front washer system operation.

- Front Wipe-After-Wash Mode - The internal circuitry and hardware of the right multi-function switch control stalk provide a wipe-after-wash mode.

- Front Wiper Mist Mode - The internal circuitry and hardware of the right multi-function switch control stalk provide a front wiper system mist mode.

- Intermittent Front Wipe Mode - The internal circuitry and hardware of the right multi-function switch control stalk and control knob provide an intermittent front wipe mode with adjustable delay interval positions.

The right multi-function switch uses an internal logic circuit, in internal relay and conventionally switched outputs to control the many functions and features it provides. The switch receives battery current on a fused ignition switch output (run-acc) circuit from a fuse in the Power Distribution Center (PDC) and the wiper and washer system fuse in the fuse block whenever the ignition switch is in the On or Accessory positions. The electronic intermittent wipe logic circuit within the switch receives a logic ground at all times through the body wire harness from a take out with an eyelet terminal connector secured under a ground screw on the left inner cowl side panel, below the left end of the instrument panel.

Following are descriptions of how the right multi- function switch control stalk and control knob are operated to control the functions and features they provide. Refer to the owner's manual in the vehicle glove box for more information on the features, use and operation of the right multi-function switch.

- Front Wash Mode - Pulling the control stalk of the right multi-function switch towards the steering wheel actuates the momentary single pole, single throw front washer switch and operates the front washer pump/motor.

- Front Wipe Modes - Moving the control stalk of the right multi-function switch up or down to one of four detent positions actuates the triple pole, quadruple throw front wiper switch and selects the Off, Low, High, or Delay front wiper operating mode. Moving the control stalk downward from the Off position actuates a momentary single pole, single throw switch that selects the Mist operating mode.

- Intermittent Front Wipe Delay Intervals - Rotating the control knob on the end of the control stalk actuates the front wiper delay variable resistor and selects the wiper delay interval when the Delay mode is selected with the front wiper switch control stalk.

The intermittent wipe logic circuit within the right multi-function switch monitors inputs from the front wiper switch circuitry, the front washer switch circuitry, the front wiper delay variable resistor, and the front wiper motor park switch. The programming of the logic circuit then determines the proper outputs to the front wiper motor. The low current logic circuit controls the high current front wiper motor by pulling the control coil of the integral wiper motor relay to ground. The wiper motor relay switches a circuit that feeds battery current to the low speed or high speed brush of the front wiper motor through the appropriate right multi-function switch circuits.