Twilight Sentinel Output

The Twilight Sentinel/DRL Module will turn on the headlights and park lights when it sees that the ignition is in RUN, the photocell indicates darkness and the twilight enable switch is in the ON position. However, the module will turn on the headlights and park lights (when the gear selector is out of PARK) if it senses darkness regardless of the twilight enable switch position. When these conditions occur the module grounds its headlight control terminal (3B) and park light control terminal (1B). The headlight control when closed, grounds the Headlight Relay through CKT 10 and the Headlight Switch. This causes the relay to energize and turn on the headlights. The module's park light control when closed, grounds the Park Lights Relay through CKT 308 and the Headlight Switch. This causes the Park Lights Relay to energize and turn on the exterior lights.