Originally Posted by dieselkiller
wow, i figured if it was that it would be blowing a fuse like in my cherokee. i will check it out. any other suggestions if its not that? also, side note; the bulb section is wrong for the 05-07 hatch, 4057 is the correct bulb for the brakes, it shows 3157.
Pretty sure those are both almost identical bulbs, both should be dual filament, same size/output. Google 4057 and 3157, they seem to be pretty much the go to brake light bulb for mustangs and f150s and they use them interchangeably too.
I always make it a habit of replacing lights in pairs, especially since they are usually sold that way. Figure if one goes out, the other should be headed that way too. Also, dont have to deal with one being brighter than the other (although shouldnt be an issue with brake lights)
I'd check the wiring, just to make sure no bare wires are exposed or the shielding isnt cracked on them.