Checking Cable

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

Check the cable between the central electronic module (CEM) and the windshield wiper motor (6/1). Check for a short-circuit to ground.

Take readings between:

Central electronic module (CEM) terminal #16B and windshield wiper motor (6/1) terminal #3.

Check the cable between the central electronic module (CEM) and the rain sensor (7/149). Check for a short-circuit to ground.

Take readings between:

Central electronic module (CEM) terminal #16B and rain sensor (7/149) terminal #4.

Also check the connectors.

If no other faults are found try a new windshield wiper motor (6/1).

Remedy as necessary.

Other information 

• See Connecting the Breakout Box
• See Signal Specification
• See Motor, Windshield Wiper, Replacing

Fig 1: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

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  Refer to Verification