Why does my radio keep fading in and out?
First, signal strength simply varies due to the things around you. Somethings can block the signal making it weaker where you happen to be for a period of time, then stronger when you get past that area. Perhaps you noticed that AM stations will fade when going under bridges. The steel in them does this.
Why does my radio keep losing sound?
Check each set of wires and speakers to be sure no wire or lead is connected to a chassis ground. The radio will see this as a short and turn off the internal amplifier causing the on but no sound issue. Each speaker connected to the radio needs dedicated positive and negative leads from the radio to each speaker.
How do you diagnose a car stereo problem?
Use a multimeter to test the stereo’s two power wires. This will help you determine if there is broken or faulty wiring. One power wire provides power to the stereo’s memory and is always hot. While the other wire is only hot when you turn on the ignition.