Hey there so my mom’s car has been having a bunch of problems and when I was just looking over her car I noticed that with the key turned to on it makes a buzzing or humming noise I’ll link a video hope you can hear it. I was wondering what this could be. She replaced the battery about 1 or 2 years ago with a battery from AAA that costed $150 and is supposed to last 7 years. The humming will get higher pitch when you turn the key off for around 20 seconds than stops. https://youtu.be/579nt8bP974
Also my mom’s car will make the chirping noise when you turn the key on and re lights go o and off but it will sometimes make that chirping noise 10 or 20 times in a row like in the middle of each other it’s really odd. I’ll see if I can record that too when it does it again. So it must have something electrical wrong but I dunno what to look thank you for your help in advanced.