Test S
PINPOINT TEST S: THE FOG LAMPS ARE INOPERATIVETest S1-S2:
Test S3-S4:
Test S5-S7:
Test S8:
Normal Operation
The fog lamps receive power from the fog lamp relay (when energized) through circuit 478 (TN/OG). The fog lamp switch (integral to the headlamp switch) is supplied power through circuit 1050 (LG/VT). When the fog lamp switch is engaged, power is switched to circuit 477 (LB/BK) which flows to the fog lamp relay coil. When the fog lamp relay is energized, the relay allows power from circuit 462 (VT) to flow through to circuit 478 (TN/OG). Circuit 462 (VT) is supplied power from BJB fuse 44 (15A), which in turn is supplied power from the high beam relay via circuit 12 (LG/BK). When the high beam relay is energized, power to circuit 12 (LG/BK) is interrupted and the fog lamps will not illuminate. Ground for the fog lamps and relays are done through circuit 1205 (BK).
Possible Causes
- circuit 12 (LG/BK) open
- circuit 462 (VT) open
- circuit 477 (LB/BK) open
- circuit 478 (TN/OG) open
- circuit 1050 (LG/VT) open
- circuit 1205 (BK) open
- fog lamp relay
- headlamp switch