My screen goes black on the Radio GPS system. When the screen comes back on it is much darker than before and I see the letters FM and AM which I never saw before before the trouble started. What could be wrong?
From the symptoms you have described, there are a few potential issues. The most likely is the navigation unit, a wiring issue, or the radio unit being defective itself. A qualified technician, such as one from YourMechanic, will be able to diagnose the electrical components in your car and perform any repairs required.
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