IdDoMe15Times
Junior Member
I just hooked up an Alpine mrp-f250 4 channel amp to my Sony cdx-f7710 head unit. When I turn the car on there is about a 4 second buzz and the screen reads failure. Once i touch a knob the failure goes away. We wired the front speakers from the wiring harness back by splicing into the harness and the backs straight to the amp. It also does the same buzz when I turn the car off. Can anyone help me diagnose the problem? I have no idea what is going on. Thanks.