no sound from radio

you will have to pull out your radio it sounds like your radio harness is either faulty or is disconnected so that the speaker wires are not connected . If the speaker wires check out then you have a defective radio either switch or internaly broken just find a replacement radio or you can upgrade if you want I put in a unit that had a DVD movie player and the headrests had screens all for 328.00 and did it myself in 4 hours. Good luck