For a complete wiring diagram Refer to Section 8W.When Monitored:With the ignition switch on.Set Condition:The WCM/WIN (SKREEM) Module has detected the ignition switch input voltage above a calibrated value.Possible Causes(F20) IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT SHORTED TO BATTERY VOLTAGEWCM/WIN (SKREEM) MODULE1. CHECK FOR ACTIVE DTCCheck to make sure the battery and charging system are operating properly. Battery and charging system problems may cause these DTC's to set.Diagnose any related Powertrain DTC(s) before continuing.Turn the ignition on.With a scan tool, read, record and erase WCM/WIN (SKREEM) DTC(s).Perform 5 ignition cycles, leaving the ignition switch on for a minimum of 90 seconds per cycle.Using the scan tool, read WCM/WIN (SKREEM) DTC(s).Does the scan tool display this DTC as active?YesGo To 2NoThe condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) 2. (F20) IGNITION SWITCH OUTPUT (RUN-START) SHORTED TO BATTERY VOLTAGE

Turn the ignition off.Disconnect the WCM/WIN (SKREEM) harness connector.Using a 12-volt test light connected to ground, probe the (F20) Ignition Switch Output (Run-Start) circuit in the WCM/WIN (SKREEM) harness connector.Does the test light illuminate brightly?YesRepair the (F20) Ignition Switch Output (Run-Start) circuit for a short to battery voltage.Perform SKREEM VERIFICATION TEST.NoReplace and program the WCM/WIN (SKREEM) in accordance with the service information.Perform SKREEM VERIFICATION TEST.