Hello i am new to this form. I have a 07 Prius (gen2) ive had the car for 2 years. One previous owner, and has 200k miles. *i know -_-* But the car works great! but recently my Audio/ radio/ aux and navigation stopped working. So i figured out that it was a fuse and i replaced with the correct one 15a low-profile ATM. So it worked for a good while and after like a week it blew again, so i replaced it. And after i drove it for about 30min coming home it blows again. So now every time i drive it, it blows a fuse right away. And recently i replaced a fuse and as soon as i put it and started the car it just blows out right away. Ive checked everywhere and ran diagnostic mode checked my 12v battery level and its all good. . so i have no idea why it keeps doing this. I also replaced the AM FUSE 7.5a under the drivers side fuse box. and that still didnt work. My car has Bluetooth installed in the car but i disabled that and it still blows a fuse. and nothing in the cigarette lighter port. So if anyone had this same issue and solved the problem please let me know! Really appreciate it!
most likely have a short circuit from when the Bluetooth was installed. you will need to disassemble the dash wherever the Bluetooth was installed and trace the wires.