Forty9,
Remove bulb.
Just below bulb is the mercury switch.
Use a magnet if it's mounted on hood. Or turn it upside down, it should just fall into your hand. See my first post picture of my hand. That is the mercury switch.
Todd
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Last edited by Shaffer's1950; 12/09/2019 11:05 PM.
1950 Chevy 3100