Checking The Wiring And Component

Check that the "Rear windshield defroster" relay 2/82 is correctly installed.

Check the rear electronic module connector and relay terminal 2/82. Check for contact resistance and oxidation according to CONTACT RESISTANCE AND OXIDATION . Check for loose connections according to LOOSE CONNECTIONS (TERMINALS) .

Check the cable between rear electronic module terminal #D1 (#B01) and "Rear windshield defroster" relay 2/82 terminal #2. Check for an intermittent short-circuit to supply voltage according to SHORT-CIRCUIT TO SUPPLY VOLTAGE, INTERMITTENT FAULTS . Check for an intermittent open-circuit according to OPEN-CIRCUIT, INTERMITTENT FAULTS .

Other information:

For further information about signals and other values, see SIGNAL SPECIFICATION .
To connect the breakout box, see CONNECTING THE BREAKOUT BOX .
When the relay is installed and activated, the voltage at the relay guide should be 0 V.

Fig 1: Identifying Ohms Display

Courtesy of VOLVO CARS CORPORATION

Fig 2: Identifying Relays And Terminals

Courtesy of VOLVO CARS CORPORATION