Wash/Wipe Switch

The reference voltage is supplied to one of two resistors connected in parallel. When the switch is not being operated the current flows through one resistor and the returned signal voltage is monitored by the instrument cluster. When the wash/wipe switch is operated, a connection is made and the current flows through the second resistor. The change in signal voltage is detected by the instrument cluster which outputs a message on the medium speed CAN bus to the CJB to activate the wash/wipe function.