F 150 4WD V8-4.6L VIN 8 (2010)
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Ignition ON.
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Measure the voltage between the SJB C2280G-1, circuit SDC04 (RD), harness side and ground.
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Is the voltage within 0.2 volt of the recorded battery voltage?
Yes
GO to H5.
No
REPAIR the circuit for high resistance. CLEAR the DTC. REPEAT the self-test.
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H5 CHECK THE SJB GROUND CIRCUIT
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Ignition OFF.
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Disconnect: Negative Battery Cable .
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Disconnect: SJB C2280D .
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Measure the resistance between the SJB C2280D-7, 8, 12, 24, circuit GD139 (BK/YE), harness side and ground.
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Is the resistance less than 5 ohms?
Yes
CONNECT the negative battery cable. GO to H6.
No
REPAIR the circuit for high resistance. CONNECT the negative battery cable. TEST the system for normal operation.
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H6 CHECK FOR CORRECT SJB OPERATION
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Disconnect 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 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. REFER to Smart Junction Box (SJB) See: Power and Ground Distribution/Power Distribution Module/Service and Repair. TEST
the system for normal operation.
No