Test B: One Low Beam Headlamp Is Inoperative

PINPOINT TEST B: ONE LOW BEAM HEADLAMP IS INOPERATIVE

B1-B2:

B3-B4:

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).

Possible Causes
- Fuse
- Circuit 57 (BK) open
- Circuit 160 (DB/WH) open or short to ground
- Circuit 161 (DG/OG) open or short to ground
- Circuit 1055 (WH/LG) open
- Circuit 1056 (DB/LG) open
- LCM