Hi I recently bought a 05 V70R, but the radio is broken. If you try to turn it on all the speakers go off in this loud buzzing noise and no matter what you do, change the volume, change stations, it’s still as the same and equally as loud. One thing to note is that when giving gas the noise gets higher in pitch and returns to its normal loudness after it revs down.

I think it’s a bad ground wire, and or a bad amp since the previous owner told me that the car keeps blowing out fuses for the amp and radio but every time he’s replaced them the radio works for a little before blowing again.

not sure exactly what it is but it’s probably just a good idea to check the ground wires. I have an electrical diagram for the car and where the ground wires are supposed to be located at but I have no idea exactly what I’m looking for/where to look(despite it saying their locations). Can anyone help me out visually? Thanks!

Electrical diagram that I got from AllData

Ground wires

Ground wires

Ground wires