Test I: One Or More Stoplamps Are Inoperative

PINPOINT TEST I: ONE OR MORE STOPLAMPS ARE INOPERATIVE

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 CCB08 (VT/WH). 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. If equipped with trailer tow, voltage is also routed to the LH and RH trailer tow stop/turn relays. Ground for the LH and RH rear stoplamps is provided through circuit GD149 (BK/GY). Ground for the high mounted stoplamp is provided through circuit GD183 (BK/WH).

DTC B2044 (Left Rear Stop Lamp Circuit Short to Ground) - 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 (Left Rear Stop Lamp Circuit Open) - 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 (Right Rear Stop Lamp Circuit Short to Ground) - 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 (Right Rear Stop Lamp Circuit Open) - is an on-demand DTC that sets when the SJB detects an open on the RH rear stop/turn lamp voltage supply circuit.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- High mounted stoplamp
- Bulb holder
- Trailer tow stop/turn relay
- SJB

I1-I2:

I2-I5:

I5-I8:

I8-I10:

I10-I11: