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Why would the high beams work and low not on a 1977 corvette?

Possible causes:

- Faulty headlight switch: The headlight switch is responsible for controlling the flow of electricity to the headlights. If the switch is faulty, it may not be able to properly engage the low beam circuit, while still allowing the high beams to function.

- Headlight relay issue: The headlight relay is an electrical component that helps to control the flow of electricity to the headlights. If the relay is faulty, it may not be able to properly engage the low beam circuit, preventing the low beams from working.

- Wiring problems: There may be an issue with the electrical wiring that connects the headlight switch, headlight relay, and headlights. If there is a loose connection or a broken wire, it can prevent the low beams from working.

- Faulty low beam bulbs: It's possible that the low beam bulbs themselves are faulty and need to be replaced.