2013 Dodge Grand Caravan High Pitch Frequency FM Stereo
My wife bought this van used and she knew there was an issue with the stereo having a high pitch frequency on the FM band. The dealer tried to swap out the stereo for another stock caravan stereo and there was no change. It only does it on the FM band when a station comes in clearly or mostly clearly. It doesn't happen when playing a cd. It does it if it is in accessory or with the ignition on and doesn't change tone or pitch with acceleration. I have traced the antenna cable back to the coupled point on the passenger side floor/side panel all is connected properly. I have traced the ground under and below the glove box, it is good and metered at a consistent .1 ohms. I looked at the connections from the antenna to the board on the stereo even though I have doubts it is the stereo itself given the dealer already tried a swap. The soldered connections appear to be good and meter a good connection on both the center pin and shielding. I tried to swap antenna mast itself and it did not change. I have tried to run the harness down and bypass the first section of antenna cable by hooking directly to where it is coupled on the passenger side, no change. I am at a loss and frustrated. For some reason the radio working is important to my wife in 2024. Any insight would be appreciated.
