Test J: The Stoplamps Are On Continuously

PINPOINT TEST J: THE STOPLAMPS ARE ON CONTINUOUSLY

J1-J8:

J9-J10:

When the brake pedal is applied, the stoplamp switch routes voltage to the smart junction box (SJB) and the high mounted stoplamp, the powertrain control module (PCM), the anti-lock brake system (ABS) module and the trailer electric brake controller through circuit CLS17 (YE/GY). When the SJB detects the brake pedal applied, the SJB provides voltage to the LH and RH rear stoplamps, and the LH and RH trailer tow turn relays through circuits CLS18 (GY/BN) and CLS19 (VT/OG), respectively.

DTC B1485 - is an on-demand DTC that sets when the SJB detects a short to voltage from the stoplamp switch input circuit.

DTC B2045 - 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 - 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.

Possible Causes
- Circuit CCB08 (VT/WH) short to voltage
- Circuit CLS17 (YE/GY) short to voltage
- Circuit CLS18 (GY/BN) short to voltage
- Circuit CLS19 (VT/OG) short to voltage
- Stoplamp switch
- Trailer electric brake controller
- ABS module
- PCM
- SJB