Hello,
It sounds like you have a headlight switch that is out, but to be sure lets check the switch to confirm before you replace it.
https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester
Check for power through the switch.
Check out the headlight switch wiring diagrams (below).
Please let us know what you find.
Cheers, Ken
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Saturday, March 6th, 2021 AT 5:19 PM