Hello Everyone, Last week I purchased a 2014 F150 Raptor, It needs a few fixes and had a cracked left rear Tail light. When I removed the tail light I found the 3 usual bulbs for Brake , Reverse, and Turn but for some reason this Raptor contains a 4th bulb that's LED in the top quarter panel of the brake light assembly. Does anyone know what this is? Was not sure if it was apart of the BLIS system or possibly the previous owner did an aftermarket modification. Red Led Diode shown in hand, Old Tail assembly on left, new tail assembly on right does not have top quarter panel plugin. If anyone know what that 4th bulb in the top corner of the tail light assembly is it would be much appreciated. I checked brake, running lights, reverse, turn signal and neither turn on either side (pass or driver).