Sorry if this has been talked about before, I am new here and looking for a while through the older chats and could not find anything. I have an 09 FLHTP, I am changing the bars with a prewired set with cruise controle. I know I will need to flash the ECM. I have also seen in a few places that I can use the three old wires from the siren switches. Has anyone done this and could I have some input please?

Thanks

 

You need to check out a wiring diagram. Sorry I can't be more specific.