Checking For Contact Resistance/Oxidation

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off.

  Remove relay 2/17. Check the relay base switches. Check for contact resistance and oxidation Also check the connector (54/3). Check for contact resistance and oxidation.

  • Install the relay
  • Activate the relay, press the horn.

  If the function is now OK the fault was caused by a contact fault in the relay base.

  Other information: 

  • See Checking Wiring And Terminals .
  Fig 2: Identifying Ohm Meter

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Was the function OK? 

• YES 

  Refer to Verification 

• NO 

  Refer to Replacing the Component