Headlamps

The headlamps are controlled by the Daytime Running Lamps (DRL) Control Module and the Light Switch Dimmer Switch. When the Light Switch is turned to HEAD and the Dimmer Switch is in LO, ground is provided to the Headlamp Relay coil through Junction Connector 2, Light Switch, Junction Connector 3 and Junction Connector 1 to G200. Since battery, voltage is applied at all times to the Headlamp Relay coil, it becomes energized. Voltage is then applied through the closed contacts of the Headlamp Relay and the HEAD FUSES (LH-UPR and RH-LWR) to the Low Beam Lamps in the Headlamps. Since ground is provided at all times to G104, the Low Beam Lamps light.

With the Dimmer Switch in HIGH, ground is provided to the DRL Control Module through the Light Switch, Junction Connector 3 and Junction Connector 1 to G200. Since voltage is applied at all times through LCU-D Fuse to the DRL Control Module and grounded at all times through Junction Connector 3 and Junction Connector I to G200, the DRL Control Module provided ground to the coil of DRL Relay 2. Since voltage is applied at all times to the DRL Relay 2 coil, it becomes energized. Voltage is then applied through the closed contacts of DRL Relay 2 and the HEAD FUSES (LH-UPR and RH-UPR) to the High Beam Lamps in the Headlamps. Voltage is applied to the coils of DRL Relay 3/4 through the DRL Fuse and the closed contacts of the Headlamp Relay, as described in the previous paragraph. The coils of DRL Relay 3/4 are grounded at all times through Junction Block 1 to G104. With voltage and ground provided to the coils of DRL Relay 3/4, they become energized. Since ground is provided to the High Beam Lamps through the closed contacts of the energized DRL Relay 3/4 and Junction Block 1 to G104, the High Beam Lamps light.

The operation of the Headlamps with the Dimmer Switch in PASS is similar to the operation of the Dimmer Switch in the HIGH position, as mentioned in the previous paragraph, with the exception that 2 ground paths are provided to the DRL Control Module. One path is through Junction Connector 2, Dimmer Switch and Junction Connector 1 to G200, which also provides a path to ground for the Headlamp Relay coil. This simulates the operation of the Light Switch in the HEAD position. The other is through the Dimmer Switch and Junction Connector 1 to G200.