The high beam module burned out
If your high beams are not working, the most likely cause is a blown fuse or a burned-out bulb — both of which you can check yourself in under 15 minutes. That said, there are seven possible culprits, ranging from simple fixes you can handle at home to electrical faults that need a mechanic's. When your low beams refuse to illuminate while the high beams blast on like nothing's wrong, it's confusing and unsafe. Nothing raises stress like driving at dusk and seeing darkness where your dipped lights should be. Electrically, these two functions are often managed through separate circuits or at least separate paths within the same circuit.
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