F 350 2WD Super Duty V10-6.8L (2009)
Q2 CHECK THE HEADLAMP SWITCH
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Ignition OFF.
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Disconnect: Headlamp Switch C205.
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Carry out the headlamp switch component test.
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Is the headlamp switch OK?
Yes
GO to Q3.
No
INSTALL a new headlamp switch. REFER to Headlamp Switch See: Headlamp/Headlamp Switch/Service and Repair. CLEAR the DTCs. REPEAT the
self-test.
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Q3 CHECK THE PARKING LAMP REQUEST INPUT CIRCUIT FOR A SHORT TO GROUND
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Disconnect: SJB C2280b.
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Measure the resistance between the headlamp switch C205-3, circuit CLS34 (GY), harness side and ground.
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Is the resistance greater than 10,000 ohms?
Yes
GO to Q7.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
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Q4 CHECK THE SJB PARKING LAMP OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE (TO CAB MARKER LAMPS)
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Ignition OFF.
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Disconnect: SJB C2280d.
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Ignition ON.
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Do the cab marker lamps continue to illuminate?
Yes
REPAIR the circuit. TEST the system for normal operation.
No
GO to Q5.
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Q5 CHECK THE SJB PARKING LAMP OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE
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Ignition OFF.
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Disconnect: SJB C2280e.
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Ignition ON.
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Do the parking lamps continue to illuminate?
Yes
