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IMPORTANT: Electrical items are covered by a 30 day EXCHANGE ONLY WARRANTY. There are no returns or refunds on such items.Best Quality Reproduction Door Jamb Dome Light Switch For 1957 Chevy Correct Style Embossed Jamb Face Plate Two Required Per Car Have you ever opened your refrigerator door at home and had the light come on? Then when you close it, it magically turns off? Well in theory, the door jamb switch is the little man in the jamb that makes this magic happen in your Tri-5 Chevy. Without it, finding anything in the dark would be a matter of fumbling around. Chevy's door jamb switch works the same way. When you open your car door, this little switch spring loaded plunger engages contact points closing the circuit and sending an electrical current to your dome light. Remember to check your connections and consult your Bel Air, 150, 210 or Nomad Chevy's service shop manual before doing any electrical project.