Headlamps

Battery positive voltage (B+) is supplied at all times to the lamp control module (LCM) through the LH MaxiFuse� Block LCM/HDLP circuit breaker via CKT 242 (RED). When the headlamp switch is placed in the ON position, the headlamp switch input to the LCM is grounded via CKT 103 (WHT). The LCM then supplies battery positive voltage (B+) via CKT 12 (TAN) to the LH low beam headlamp and RH low beam headlamp, respectively. When the headlamp dimmer switch is placed in the HIGH position, the LCM removes battery positive voltage (B+) from the low beam headlamps and supplies battery positive voltage (B+) via CKT 11 (LT GRN) to the LH high beam headlamp and RH high beam headlamp, respectively. When the ignition switch is in the RUN position and the ambient light sensor indicates darkness, the LCM provides battery positive voltage (B+) to the appropriate headlamps.