Checking the wiring

Remove horn relay 2/17 from the engine compartment relay base.

Check the relay coil driver circuit for a short-circuit to supply voltage: Measure the voltage between terminal #1 in the relay base and relay 2/17.

For further information about a short-circuit to supply voltage.

HINT: The voltage between terminal #2 and ground should be approximately 0 volt. 

Other information: 

• For information about the central electronic module (CEM), see Central electronic module (CEM), replacing
• See Checking wiring and terminals

Fig 1: Identifying Voltage Display

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Connectors

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Continue 

  Refer to Verification