Test B: One Low Beam Headlamp Is Inoperative

PINPOINT TEST B: ONE LOW BEAM HEADLAMP IS INOPERATIVE

Normal Operation
The lighting control module (LCM) is supplied voltage from the central junction box (CJB) through circuits 1055 (WH/LG) and 1056 (DB/LG) for the LH and RH low beams, respectively. When a request for the low beams is received by the LCM, the LCM provides voltage through circuits 160 (DB/WH) and 161 (DG/OG) to the LH and RH headlamps, respectively. Ground for the low beams is provided through circuit 57 (BK).

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- LCM

B1:

B1-B3:

B4: