Explorer Sport Trac 2WD V6-4.0L (2009)
GO to H5.
No
REPAIR the circuit. TEST the system for normal operation.
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H5 CHECK FOR CORRECT SJB OPERATION
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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.
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Pinpoint Test J: The Stoplamps Are On Continuously
Stoplamps
Pinpoint Tests
Pinpoint Test J: The Stoplamps Are On Continuously
Refer to Wiring Diagram Set 90, Turn Signal/Stop/Hazard Lamps for schematic and connector information. See: Diagrams/Electrical
Diagrams/Diagrams By Number
Refer to Wiring Diagram Set 42, Vehicle Dynamic Systems for schematic and connector information. See: Diagrams/Electrical Diagrams/Diagrams By
Number
Normal Operation - All Vehicles
When the brake pedal is applied, the stoplamp switch routes voltage to the Smart Junction Box (SJB), the brake shift interlock actuator, the Trailer Brake
Control (TBC) module, the ABS module, and the PCM through circuit CCB08 (VT/WH). The voltage is then routed out of the SJB to the high mounted
stoplamp through circuit CCB08 (VT/WH).
Explorer, Explorer Sport Trac
When the SJB detects the brake pedal is applied, the SJB provides voltage to the LH and RH rear stoplamps through circuits CLS18 (GY/BN) and
CLS19 (VT/OG).
Mountaineer
When the SJB detects the brake pedal is applied, the SJB provides voltage to the LH and RH rear stoplamps through circuit CLS44 (VT/BN).
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DTC B1446 (Brake Switch Circuit Failure) - an on-demand DTC that sets when the SJB detects a short to voltage from the brake pedal applied
input circuit.
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DTC B2049 (Left Rear Turn Lamp Circuit Open) - a continuous and on-demand DTC that sets when the SJB detects a short to voltage from the
LH rear turn lamp voltage supply circuit.
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DTC B2051 (Right Rear Turn Lamp Circuit Open) - a continuous and on-demand DTC that sets when the SJB detects an open from the RH rear
turn lamp voltage supply circuit.
This pinpoint test is intended to diagnose the following: