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Home >> Volvo >> 2005 >> XC90 T-6 >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> Electrical - Symptom Related Diagnostic Procedures - 2 Of 2 >> Checking The Rear Fog Lamp (2003-04) >> Checking The Rear Fog Lamp >> Checking Components And Wiring

Checking Components And Wiring

Check that fuse 11D/2 is intact.

Check that shunt 20/29 is not damaged. The resistance between the terminal pins is 0 ohm to 5 ohms depending on which pin the reading is taken at.

Check the cables between: 

fuse 11D/2 terminal #2 and rear electronic module terminal #4E

shunt 20/29 terminal #2 and relay 2/49 terminal #5

relay 2/49 terminal #3 and the left or right lower lamp housing terminal #3

for an open-circuit according to OPEN-CIRCUIT, PERMANENT FAULTS and a short-circuit to ground according to SHORT-CIRCUIT TO GROUND, PERMANENT FAULTS .

Check the cable between the left or right lower lamp housing terminal #4 and the ground terminal for an open-circuit according to OPEN-CIRCUIT, PERMANENT FAULTS .

Check that the bulbs are intact.

Remedy as necessary.

Other information: 

Fig 1: Identifying Terminals
GLL104023Courtesy of VOLVO CARS CORPORATION
Fig 2: Identifying Ohmmeter
GLL101042Courtesy of VOLVO CARS CORPORATION
Fig 3: Identifying Relays
GLL104090Courtesy of VOLVO CARS CORPORATION