Hi guys. I have a issue... When I turn on the ignition my radio turn on normally, but sometimes when I turn on the engine the stereo didn't turn on and it takes some minutos to get back the power. I'm sure is not the Stereo because I changed the old one and the problem stills, and I check the fuse box and the ground cable. I don't know if someone have an idea or can help me with this

 

My first thought would be bad connection on the wire harness. If it's an aftermarket stereo it will most likely have spliced on connector that came with the radio. Same thing goes if the installer made an adapter harness. Either way you could have a bad power or ground splice.

 

Hi it's an aftermarket stereo. I will check the connections should I focus on some specific cables or every of them?

 

Like I said, either the power or ground wire. Those are the only two that will prevent it from turning on. Depending on what year you have, the cars wire harness colors will be different.

On the aftermarket side of the harness red should be accessory-power and black should be ground.