Diagnosis And Testing - Wiper On And Off Relay

The hard wired inputs and outputs of the wiper On and Off relay within the front Power Distribution Center (PDC) may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. However, conventional diagnostic methods will not prove conclusive in the diagnosis of the Body Control Module (BCM) or the electronic controls and communication between modules and other devices that provide some features of the BCM-controlled wiper On and Off relay. The most reliable, efficient and accurate means to diagnose the BCM or the electronic controls and communication related to BCM-controlled wiper On and Off relay operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.