I'm posting this for a friend of mine. He 2009 sportster 1200 custom rear brake lights don't work and rear turn signals don't work, but hazards And rear running light works. ???? Any suggestions on how to rectify problem?

 

We really need to know a bit more about your friend's bike, like are there any recent mods, such as a change of handlebars for apes, internal wiring, etc.