SOURCE: 04 Santa Fe Issues
I would look for a ground that is inadequate.
If any part of this is operating essentially without shielding due to a bad ground, then cell towers, a radio or TV station transmitter, CBs, land mobile radio, amateur radio - any of these can inject enough signal to drive modern electronics completely bananas.
The onboard electronics used for just about everything that is remotely controlled by switches generates a ton of digital garbage and can interfere with anything.
The kind of problem you are experiencing started when we stopped using vacuum tubes 50 years ago operating at high voltages and started using semiconductors that use much lower voltages.
A tech with a common multimeter should be able to locate the missing ground connection without too much trouble.
SOURCE: 2003 elantra radio not working
Sounds like the Antenna, Antenna are cheaper to try. pull out the radio and plug in a universal antenna. see if it works.
SOURCE: the radio is stuck on one station and won't change or turn off
try to replace it with a different CD player
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