Checking air conditioning (A/C) relay

Connect an ohmmeter between the air conditioning (A/C) relay terminals #1 and #2 (relay side).

Fig 1: Identifying Air Conditioning (A/C) Relay Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

The ohmmeter should read approximately 105 Ω at +20 °C. 

• OK 

  Refer to Checking the signal cable 

• NOT OK 

  Refer to Defective air conditioning (A/C) relay