Wiper Switch Mux Ckt Short To Ground

Turn ignition on. Using scan tool, erase BCM DTCs. Turn ignition off, then on. Turn wiper switch to each intermittent position, then low and high speed positions. Read BCM DTCs. If scan tool displays WIPER SWITCH MUX CKT SHORT TO GROUND, go to next step. If scan tool does not display WIPER SWITCH MUX CKT SHORT TO GROUND, test is complete. DTC is not present at this time.
Turn ignition off. Disconnect right multifunction switch connector. See Figure. Disconnect Body Control Module (BCM) connector C2. See Figure. Using DVOM, measure resistance between ground and BCM connector C2 terminal No. 11 (Dark Green/Red wire). See Figure. If resistance is 5 ohms or greater, go to next step. If resistance is less than 5 ohms, repair short to ground in Dark Green/Red wire. Perform BODY VERIFICATION TEST under VERIFICATION TESTS.
Ensure wiper switch is in OFF position. Using DVOM, measure resistance between terminals No. 7 and 8 on right multifunction switch component connector. Rotate wiper switch to HIGH position while monitoring DVOM. If resistance is not less than 40 ohms in any position, go to next step. If resistance is less than 40 ohms in any position, replace right multifunction switch. Perform BODY VERIFICATION TEST under VERIFICATION TESTS.
Ensure BCM connector C2 is disconnected. Turn ignition on. Using scan tool, read WIPER MODE SW VOLTS sensor. If sensor volts are less than .3 volts, replace BCM. See BODY CONTROL MODULE under REMOVAL & INSTALLATION. Perform BODY VERIFICATION TEST under VERIFICATION TESTS. If sensor volts are .3 volts or greater, test is complete.