I'm having a problem with my 3rd brake light. It's almost all dark and deff don't have 250+ to buy one anytime soon. So I figured I could install an extra 3rd light somewhere around my back window. I've tried several lights but none seem to come on. Can anybody help me figure out what's missing? I currently bought a 26 led bar to put there but it doesn't even turn any on, I did notice that the trunk bar is 13.3 volts whereas the lights I've tried are 12 volt does that, make enough difference not to turn them on?