My right back light is going weird, when I put my right indicator on it like switches from the brake light and then the indicator then back to the brake light and so on?
Corrosion on the contacts more than likely. Had the same thing on my old clio. Whips the connectors off and get some wire wool or fine wet n dry paper and clean them up. If that doesn't do it check the earth. Be in the boot somewhere, bolted to the chassis. Boot floor probably.