F-250 Bunt Cut Wire at Rear Bumper

[joec410]

Does anyone know what the bunt cut wire is for on the frame rail near the rear bumper? If I remember it is blue with a purple stripe. Is this a pass thru wire that is run to the rear of the truck?

Thanks

Joe

 

[Clean-15]

I was curious about this too. Anyone?

 

[PDT1081]

3rd brake light for a topper?

 

[joec410]

Thanks