Pinpoint Test J: The Stoplamps Are On Continuously: Notes

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 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, the PCM and the speed control actuator 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), respectively. 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) - is 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) - is an on-demand DTC that sets when the SJB detects a short to voltage on the LH rear stop/turn lamp voltage supply circuit.

DTC B2047 (Right Rear Stoplamp Circuit Open) - is 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:

Wiring, terminals or connectors
Stoplamp switch
Speed control actuator
PCM
SJB