Test K: The Stoplamps Are On Continuously

PINPOINT TEST K: THE STOPLAMPS ARE ON CONTINUOUSLY

K1-K6:

K7-K9:

Normal Operation - Fusion
When the brake pedal is applied, the stoplamp switch routes voltage to the smart junction box (SJB) through circuit CCB08 (VT/WH). The voltage is then routed out of the SJB to the high mounted stoplamp through circuit CLS17 (YE/GY). The SJB also supplies voltage to the LH and RH rear stoplamps through circuit CLS18 (GY/BN) and circuit CLS19 (VT/OG), respectively.

Normal Operation - Milan, MKZ
When the brake pedal is applied, the stoplamp switch routes voltage to the SJB through circuit CCB08 (VT/WH). The voltage is then routed out of the SJB to the stoplamps through circuit CLS17 (YE/GY).

The rear lamps contain electronics that modulate the voltage frequency to the LED bulbs.

DTC B1485 - is an on-demand DTC that sets when the SJB detects a short to voltage from the stoplamp switch input 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
- SJB
- Powertrain control module (PCM)