Checking connectors and cables

Check the control module, display and light switch connectors for contact resistance and oxidation according to Contact resistance and oxidation .

Check the cable between the control module #B4 and display terminal 14 and cable between display terminal 14 and light switch terminal 1 for an open-circuit according to Open-circuit, permanent faults , a short-circuit to ground according to Short-circuit to ground, permanent faults and a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

Remedy as necessary.

Other information:

To access/replace the control module, see Replacing the control module, old system .
To access/replace the display, see Replacing the display .
For further information about the circuit from the light switch, see the Service Manual Wiring Diagram.
For connecting breakout box, see Connecting the breakout box .

Fig 1: Identifying Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Control Module Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 4: Identifying Display

Courtesy of VOLVO CARS OF NORTH AMERICA.