i need some help on how to fix these few problems with my audi 100. the power locks don't work, the highbeam switch dosen't work(we even replaced the headlight, did nothing), and when i hit a bump sometimes the warning will come on that my headlight isn't working.
can you give me some advice on how to fix it?

Start looking at the ground wires - It is best if you get a Bently manual to see where they all are.

try replacing the indicators sick + light stick (the whole cluster round the steering column) ull have to remove the steering wheel it self. ive had so many probs with them part they make ya speedo lights go on n off ya head lights play up n make the bulb blown circuit go nuts if that helps.