Test J: The Stoplamps Are On Continuously

PINPOINT TEST J: THE STOPLAMPS ARE ON CONTINUOUSLY

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 4X4 control 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), respectively.

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).

- DTC B1446 (Brake Switch Circuit Failure) - is an on-demand DTC that sets when the SJB detects a short to voltage from the brake pedal applied input circuit.
- DTC B2049 (Left Rear Turn Lamp Circuit Open) - is 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.
- DTC B2051 (Right Rear Turn Lamp Circuit Open) - is 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:
- Wiring, terminals or connectors
- Stoplamp switch
- Trailer brake control (TBC) module
- Brake shift interlock actuator
- 4X4 control module
- ABS module
- PCM
- SJB

J1-J8:

J9-J13:

J14: