Test I: One Or More Stoplamps Are Inoperative

PINPOINT TEST I: ONE OR MORE STOPLAMPS ARE INOPERATIVE

I1-I2:

I3-I6:

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 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 circuits GD149 (BK/GY) and GD151 (BK/GN), respectively. Ground for the high mounted stoplamp is provided through circuit GD149 (BK/GY).

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
- Trailer tow stop/turn relay (if equipped)
- High mounted stoplamp
- SJB