Thanx for your help. I am diggin in to dash. My radio was not powering on either so I had to get one from ebay and installed it and had it coded. So radio was fried before. Thought my amp was not working so I bought one and replaced it and same thing no sound. I tried to replace tcu too, nothing. I tried fiber optic loop all modules in the back. The only thing I havent got to is hud I want to loop that and see if sound starts working.