Checking ground terminals

Fig 1: Identifying Ignition Off Position

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Disconnecting Control Unit

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off.
• Switch off all equipment that takes power from the battery (courtesy lighting, radio etc).

  Connect an ohmmeter between the battery negative terminal and:

  #15 (#A15)

  #17 (#A17) on the breakout box.

  Fig 3: Identifying Breakout Box

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 4: Identifying Ohmmeter

  Courtesy of VOLVO CARS OF NORTH AMERICA.

The ohmmeter should read approx. 0 Ω for all readings 

• OK 

  Refer to Checking the voltage to the bulbs 

• NOT OK 

  Refer to Checking for an open-circuit