Quote, originally posted by ParknVibe »Yes I know of mercury switches. The liquid mercuy enclosed in a glass bulb. Would of suggested that, but I would not believe they would use that because the rocking around of the car would make the light flash all the time. But I just don't know, maybe they did have one like you said. I would think they would use a solid, like a small bearing, but, they use these
http://www.parts-express.com/p...0-852Just mount at an angle that makes contact only whe the hood is up (think hinge) and the light should stay off. I'll look at the truck light as the underhood switch on that is right next to the socket.