Fuses: Double-check the fuses related to the headlamps. Sometimes a fuse may look intact but still be blown, so test each one with a multimeter or replace the fuses with new ones to ensure proper function.
Headlight Switch: Check if the headlight switch on the dashboard is turned on and/ or if the auto mode is engaged.
Wiring and Connectors: Inspect the wiring and connectors leading to the headlamps for any damage, corrosion or loose connections. Cleaning or replacing the connectors might resolve the issue.
Headlight Relay: The headlamp relay controls the power supply to the headlamps. If the relay is faulty, the headlamps would not receive the necessary power. Try replacing the headlamp relay and check if the headlamps start working.
Headlight Socket: Check if the headlight socket is damaged and not making proper contact with the bulbs. Replacing the socket can resolve the issues.
Headlamp Assembly: In case all the aforementioned checks do not resolve the issue, the problem could lie within the headlamp assembly itself. It might need to be replaced or inspected for specific internal issues.
When it comes to electrical diagnosis like this, it's recommended to follow the vehicle's wiring diagram and consult a repair manual specific to your Chevy Malibu model.
