Checking Cable

HINT: The fault could also have been caused by the windshield wipers sticking. 

Check the cable between central electronic module (CEM) terminal #16B and windshield wiper motor (6/1) terminal #3. Check the cable between central electronic module (CEM) terminal #16B and rain sensor (7/149) terminal #4.

Check for an intermittent short-circuit to ground.

Check the connector.

Remedy as necessary.

Other information 

• See Connecting the Breakout Box
• See Signal Specification
• See Checking Wiring And Terminals

Fig 1: Identifying Windshield Wiper Motor Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.