Focus L4-2.0L (2009)
self-test.
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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
When the brake pedal is applied, the stoplamp switch routes voltage to the Smart Junction Box (SJB), the high mounted stoplamp, the ABS module (if
equipped with stability control) and the PCM through circuit CCB08 (VT/WH). When the SJB detects the brake pedal applied, the SJB provides voltage
to the LH and RH rear stoplamps through circuits CLS18 (GY/BN) and CLS19 (VT/OG).
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DTC B1485 (Brake Pedal Input Short to Battery) - an on-demand DTC that sets when the SJB detects a short to voltage from the stoplamp switch
input circuit.
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DTC B2045 (Left Rear Stoplamp Circuit Open) - an on-demand DTC that sets when the SJB detects a short to voltage on the LH rear stop/turn
lamp voltage supply circuit.
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DTC B2047 (Right Rear Stoplamp Circuit Open) - an on-demand DTC that sets when the SJB detects a short to voltage on the RH rear stop/turn
lamp voltage supply circuit.
This pinpoint test is intended to diagnose the following:
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Wiring, terminals or connectors
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Stoplamp switch
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ABS module
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PCM
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SJB
PINPOINT TEST J: THE STOPLAMPS ARE ON CONTINUOUSLY
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J1 DETERMINE IF ALL THE STOPLAMPS ARE ILLUMINATED
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Ignition OFF.
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Observe the stoplamps with the brake pedal released.
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Are all of the stoplamps illuminated?
Yes
GO to J2.
No
GO to J6.
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J2 CHECK THE STOPLAMP SWITCH
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Disconnect: Stoplamp Switch C278.
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Do the stoplamps continue to illuminate?
Yes
GO to J3.
No
INSTALL a new stoplamp switch. REFER to Stoplamp Switch See: Brake Light Switch/Service and Repair. CLEAR the DTCs. REPEAT the self-test.
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