2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 353
Circuit/System Description
The body control module (BCM) controls the single speed rear wiper motor by its active high output to the external rear wiper motor relay. When
the BCM activates its output and applies battery to the coil of the relay, the relay energizes, allowing battery voltage from the fuse to be applied
through the switched contacts of the rear wiper motor relay to the control input of the rear wiper motor. The motor then operates continuously at
low speed.
Conditions for Running the DTC
* Ignition ON.
* The system voltage is between 9-16 V.
Conditions for Setting the DTC
A short to ground is detected in the rear window wiper relay control circuit.
Action Taken When the DTC Sets
Rear wiper operation is suspended.
Conditions for Clearing the DTC
A current DTC clears when the diagnostic runs and passes.
Reference Information
Schematic Reference
Wiper/Washer Schematics (See: Wiper and Washer Systems/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
Description and Operation
Wiper/Washer System Description and Operation (See: Wiper and Washer Systems/Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
Operate the rear wiper by using the S82 Windshield Wiper/Washer Switch in the continuous and the intermittent position. Verify the M45 Rear
Wiper Motor activates.
Circuit/System Testing
1. Ignition OFF, disconnect the KR7 Rear Wiper Relay.
2. Test for less than 5 ohm between the ground circuit terminal 86 and ground.
