Headlight Switches Headlight Breaker Works
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A close-up of the headlight circuit breaker demonstrates how it works. Contact points carry electrical load. When there's a short or poor contact that causes high resistance, the connection gets hot, causing the bimetallic strip to bend/distort, which opens contacts (lights off). When it cools (quickly), contact is made and lights come back on. If there's a short, it will cycle wildly. View Related Article
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