Pinpoint Test K: The Stoplamps Are On Continuously: Notes
WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
Refer to appropriate SYSTEM WIRING DIAGRAMS article , Turn Signal/Stop/Hazard Lamps for schematic and connector information.
When the brake pedal is applied, the stoplamp switch routes voltage to the Smart Junction Box (SJB), the high mounted stoplamp, and the PCM. When the SJB detects the brake pedal is applied, the SJB provides voltage to the LH and RH rear stoplamps. If equipped with trailer tow, voltage is also supplied to the respective trailer tow stop/turn relay.
- 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.
- DTC B2045 (Left Rear Stop Lamp Circuit Open) - an on-demand DTC that sets when the SJB detects a short to voltage from the LH rear stop/turn lamp voltage supply circuit.
- DTC B2047 (Right Rear Stoplamp Circuit Open) - an on-demand DTC that sets when the SJB detects a short to voltage from the RH rear stop/turn lamp voltage supply circuit.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Stoplamp switch
- PCM
- SJB