In dash Radio repair?

[Nysrodo]

Originally Posted by PapaBear

Pioneer cheap speakers has a fuse inside that protects the main board from frying. When it goes the RCAs are not grounded anymore. One solution is to take a long strip of bare wire and wrap around the RCA jacks and ground it to radio chassis. Google pioneer RCA fuse.

My pioneer sound system does producing buzzing sound. What could be the reason behind it? I have checked the fuse there is no problem.