Checking the power supply

Fig 1: Identifying Ignition OFF

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Fig 2: Disconnecting Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off
• Remove system relay 2/14 from the integrated relay / fusebox in the engine compartment.

  Using a voltmeter, measure the voltage between system relay base terminal 5 and ground.

  Fig 3: Identifying System Relay Base Connector Terminals

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

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 5: Identifying Integrated Relay/Fusebox In Engine Compartment

  Courtesy of VOLVO CARS OF NORTH AMERICA.

The voltmeter should read battery voltage. 

• OK 

  Refer to Checking the power cable 

• NOT OK 

  Refer to Checking cables