Hello, I think I have a problem with my 2009 Toyota corolla's electrical system. The stereo, sunroof, and front passenger side window are not working. They can not be turned on and open. I check the fuse box and even replace the window regulator but they still don't work. So I want to ask that if there is any problem with the electrical system itself instead of the part. Thank you.
It sounds like a problem with the electrical system itself not the parts. The likelihood of them all not working suddenly at the same time is slim to none. I would double check the fuse because I have seen it where a fuse blows partially and still causes everything to stop working. Check the wiring diagram and if a fuse is not to blame it could be a bad ground.
Adding to the above comment, If the fuses are good, you can check the fuse box to see if you have any power there.
Back trace each non functional component on the wiring diagrams to see if they share a common power supply. If they all share a common problem, then if you fix one, you'll fix them all.
