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My old 91 Chevy truck had a decent under hood light that you could remove and use as a trouble light then wind it back up. Too bad its 2016 and something that simple and effective is not standard equipment unless they figure most people call for help than look or work on the issue themselves.
I just ordered an aux fuse block, wires, and some other stuff. A plunger switch is on my list. But then I thought: when I pop the hood, I get a notification on the screen that my hood is ajar. So, there's got to be a switch there somewhere already, yeah?
I haven't looked for it... but does anyone know where it might be?
There is an existing hood switch approximately 1/2 way down the driver's side on nearly all F-150s. You can verify this by popping your hood, but not opening it. Then lock the truck. Now open the hood. When the horn is done deafening you, you know there is a switch there.
As to whether that switch is supplying a ground, and whether you can tap it to supply a ground to the lights, I cannot answer.