F 350 4WD Super Duty V8-5.4L (2009)
If equipped with trailer tow mirrors, GO to Q6.
If not equipped with trailer tow mirrors, REPAIR circuit CLS30 (VT/WH) for a short to voltage. TEST the system for normal operation.
No
GO to Q7.
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Q6 CHECK THE TRAILER TOW MARKER LAMP SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE
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Ignition OFF.
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Disconnect: Battery Junction Box (BJB) Fuse 64 (5A).
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Ignition ON.
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Do the parking lamps continue to illuminate?
Yes
REPAIR circuit CLS30 (VT/WH) for a short to voltage. TEST the system for normal operation.
No
REPAIR circuit CBB64 (VT/GN) for a short to voltage. TEST the system for normal operation.
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Q7 CHECK FOR CORRECT SJB OPERATION
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Ignition OFF.
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Disconnect all the SJB connectors.
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Check for:
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corrosion
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damaged pins
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pushed-out pins
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Connect all the SJB connectors and make sure they seat correctly.
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Operate the system and verify the concern is still present.
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Is the concern still present?
Yes
INSTALL a new SJB. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the
self-test.
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