Checking Wiring

Check the signal cable. Check for an open-circuit. Check for a short-circuit to ground.

Take readings between:

• Central electronic module (CEM) terminal #A40 (#40) and light switch module (LSM) connector terminal #14-C320.

Remedy as necessary.

Other information 

• see CONNECTING THE BREAKOUT BOX (2008, 2009, 2010, 2011)
• see SIGNAL DESCRIPTION CENTRAL ELECTRONIC MODULE (CEM) (2008, 2009, 2010, 2011)
• see LOCATION OF COMPONENTS (2008, 2009)
• see CONTROL MODULE RELAY BOX PASSENGER COMPARTMENT
• see CHECKING WIRING AND TERMINALS

Fig 3: Identifying M2D Control Module (FORTV Executive. Rear Seat Entertainment, Generation 3.1/3.2, Premier TV Receiver) Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 4: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 5: Identifying Rheostat

Courtesy of VOLVO CARS OF NORTH AMERICA.

Refer to VERIFICATION