2021 Ford F150 Tremor
Ford has a wire for the purpose of hooking up additional brake lights.
But they are jerks, make it damn near impossible to find, don’t document crap and put it in a weird location.
It is located under the hood, drivers side, toward the front.
I had to take off the air intake housing to make it easier, but it’s not required.
The damn thing is taped to a wire bundle, directly below the bolt holding the air housing on.
It’s not in the bundle, it’s taped outside, but they placed it in an almost impossible place.
It’s immediately below the bolt for the air intake on the drivers side.
I had to take off the air intake, no way i could tweak my fingers to get this damn thing.
It will take several tries, where you swear it’s not there, something must be wrong…but keep looking.
This is the wire, but in this pic it’s pointed back toward the driver, when you try and find it it’ll be along that wire bundle, pointed forward, hidden like someone hates you.
It will only light up when the truck is turned on and brakes are applied.