Test I: One Or More Stoplamps Are Inoperative

PINPOINT TEST I: ONE OR MORE STOPLAMPS ARE INOPERATIVE

I1-I2:

I3-I7:

I7-I9:

I9-I10:

Normal Operation
When the brake pedal is applied, the stoplamp switch routes voltage to the smart junction box (SJB) and the high mounted stoplamp 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. Ground for the LH and RH rear stoplamps is provided through circuits GD149 (BK/GY) and GD151 (BK/GN), respectively. Ground for the high mounted stoplamp is provided through circuit GD150 (BK/WH).

DTC B2044 - is a continuous and on-demand DTC that sets when the SJB detects a short to ground on the LH rear stop/turn lamp voltage supply circuit.

DTC B2045 - is an on-demand DTC that sets when the SJB detects an open on the LH rear stop/turn lamp voltage supply circuit.

DTC B2046 - is a continuous and on-demand DTC that sets when the SJB detects a short to ground on the RH rear stop/turn lamp voltage supply circuit.

DTC B2047 - is an on-demand DTC that sets when the SJB detects an open on the RH rear stop/turn lamp voltage supply circuit.

Possible Causes
- Circuit CLS17 (YE/GY) open
- Circuit CLS18 (GY/BN) open or short to ground
- Circuit CLS19 (VT/OG) open or short to ground
- Circuit GD149 (BK/GY) open
- Circuit GD150 (BK/WH) open
- Circuit GD151 (BK/GN) open
- High mounted stoplamp
- Trailer tow turn relay
- SJB