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Home >> Ford >> 2004 >> Freestar V6-4.2L VIN 2 >> Repair and Diagnosis >> Lighting and Horns >> Fog/Driving Lamp >> Testing and Inspection >> Pinpoint Tests >> Test S
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Test S

PINPOINT TEST S: THE FOG LAMPS ARE ON CONTINUOUSLY


Test S1-S3:






Test S4-S9:






Normal Operation
The SJB sends a voltage signal to the headlamp switch through circuit 1669 (OG/LG). When the fog lamp switch is engaged, the voltage signal is routed to ground through circuit 1205 (BK). When the fog lamp switch is engaged, the SJB provides a ground source for the fog lamp relay coil to energize through circuit 1347 (DG/WH). The fog lamp relay receives power from within the BEC. When the SJB grounds circuit 1347 (DG/WH), the fog lamp relay is energized, switching voltage to circuits 1721 (LB/BK) and 1776 (TN/OG). Circuits 1721 (LB/BK) and 1776 (TN/OG) provide power to the LH and RH fog lamps, respectively.

Possible Causes
- circuit 1669 (OG/LG) short to ground
- circuit 1347 (DG/WH) short to ground
- circuit 1721 (LB/BK) short to power
- circuit 1776 (TN/OG) short to power
- fog lamp relay
- headlamp switch
- BEC
- SJB
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