Checking contact resistance, oxidation and wiring

Check the amplifier and head unit / audio control module connectors for contact resistance and oxidation according to Contact resistance and oxidation . Remedy if necessary.

Check the cable between the amplifier terminal #D6 and head unit / audio control module terminal #E6 for an intermittent open-circuit according to Open-circuit, intermittent faults .

Remedy as necessary.

Other information: 

• See Radio equipment, replacing
• See Radio/telephone, changing
• See Connecting the breakout box, Audio control module
• See Signal specification, audio control module

Fig 1: Identifying Breakout Box

Courtesy of VOLVO CARS OF NORTH AMERICA.