1. Headlight Switch: Check if the headlight switch is turned on. Ensure the switch is set to the appropriate position for the lights you are trying to use (typically marked as headlights, parking lights, etc.).
2. Headlight Relay: Locate the headlight relay and check if it is functioning properly. The relay is responsible for providing power to the headlights and other lighting components. If it fails the headlights and dashboard lights won't work.
3. Wiring Connections: Inspect the electrical wiring and connections between the headlight switch, relay and headlights. Make sure there are no loose connections or damaged wires.
4. Headlight Bulbs: Check if the headlight and parking light bulbs are properly seated and not burnt out. Replace any faulty bulbs if necessary.
5. Headlight Socket: Examine the headlight sockets to ensure they are clean and free from corrosion or damage. Clean or replace the sockets if needed.
6. Multi-Function Switch: The multi-function switch (also called the turn signal switch) is responsible for controlling the headlights and parking lights. Make sure the switch is functioning properly and all the wires are connected well inside.
7. Electrical Ground: Confirm that the electrical ground connections for the headlights and parking lights are secure and corrosion-free.
8. BCM (Body Control Module): In some Nissan Frontier models, the Body Control Module (BCM) may control the lighting functions. If there's an issue with the BCM it could cause the dashboard lights and parking lights not to work.
Note: If diagnosing and troubleshooting the issue becomes too complex or requires deeper electrical expertise, it's recommended to consult with a qualified auto technician or electrician for further assistance.
