my friend has a sedan, clean, everything works perfectly. today my friend and brother was doing something to the car (i dont know) and now the corner lights doesnt go on..fuse is fine, what my brother is asking me to do is to ask HT, how do u troublehoot this problem to find out what had happened? in other words, what could have caused this?

now in my car (a different sedan) my car drives fine. at night time, i turn on my headlights and i smell this wire burn inside my car. once i click my lights on, my cluster dims, everytime i release the clutch all the way, my car chokes, my clock dims, and my deck turns off..this burnt wire smell only happens when i turn on the lights, now what causes this problem?

like the 1st situation above, my car has the same problem. when i click my lights to come on, my driver side corner light lights up, and my passenger doesnt get power..so that side doesnt light up..

i need help asap. any help, tips, info is appreciated.