i have a guess- check if this noise is at the front, on my peugeot 406 there was a very thin steel plate completely missing, this is a heatshield that blocks hot brakes from overheating rubber, it was attached just under the spring. i have attempted to put my own on but didnt do it right and first try it made diabolic screeching noises. this thing might have rusted up and is scraping against the brake disc
get the machine up on a lift and check if anything scrapes against at the front while turning the wheel and turning the front wheels
otherwise theres a stabilizer rod on the back which engages while you turn, it may also be something about that- youre looking for something getting stuck while you turn thats my 2 guesses for something making noise when turning