The radio itself does work, AM and CD work just fine, but the FM radio is extremely quiet to the point that cranking the volume all the way up only brings it to a whisper volume. I've already checked the fuses and they're all fine, I've reset the radio, done just about everything I could think of in the settings and nothing has fixed it. Anybody that has run into this issue and has found a fix, your story would be appreciated.

I've been searching for a solution to the problem and have only found two forum posts across the internet that acknowledge the problem. None of them have any actual answers, but this post linked below sums up the problem the best and has the only on topic answers.
https://www.f150online.com/forums/20...-real-low.html

This link has the exact same problem too, but no responses...
https://www.f150online.com/forums/20...2006-f150.html

 

Usually the AM has a problem if there is an antenna problem.

Not saying there couldn't be an antenna problem, but FM is easier to receive with a short antenna.

Your better move would be to have a radio shop check it out.

 

Try the Audio Unit self test.....


Speaker Walk-Around Test

NOTE: To enter the speaker walk-around test or audio unit self-diagnostic mode, the audio unit must be turned on and in radio tuner mode (AM/FM).

1. To enter the speaker walk-around test, simultaneously press the audio unit preset buttons 3 and 6.

1. The speaker walk-around test applies sound to each speaker for approximately 1-2 seconds. Each speaker is tested and displayed on the audio unit in the following sequence: RF, LF, LR and RR.

1. To exit the speaker walk-around test, turn the ignition switch off, turn the audio unit off, or press preset button 1-6 or the CD button to initiate the diagnostic mode before the self-test completes (CDX6).

1. NOTE: Turning the ignition switch off and back on may not re-enable the DVD player buttons.
   The speaker walk-around test disables the DVD player buttons. To re-enable the DVD player buttons, turn the audio unit off and back on or simultaneously press the audio unit preset buttons 3 and 5 until the headphone symbol lights up on the audio unit display. Simultaneously pressing the audio unit preset buttons 2 and 4 also re-enables the DVD player buttons and changes the system between single play and dual play. In dual play, the rear speakers and subwoofer turn off and the headphone outputs turn on.

Audio Unit Self-Diagnostic Test

NOTE: To enter the speaker walk-around test or audio unit self-diagnostic test, the audio unit must be turned on and in radio tuner mode (AM/FM).

1. To enter the following tests, press the desired preset button while in the speaker walk-around test or while in the audio unit self-diagnostic test.

1. To exit the audio unit self-diagnostic test, turn the ignition switch or the audio unit off.

1. NOTE: Turning the ignition switch off and back on may not re-enable the DVD player buttons.
   The audio unit self-diagnostic test disables the DVD player buttons. To re-enable the DVD player buttons, turn the audio unit off and back on. The headphone symbol lights up on the audio unit display to indicate the DVD player buttons are re-enabled.

1. If the concern remains and the fault is not detected, GO to Symptom Chart.

1. The self-diagnostic test has 7 manual tests available:
   • Preset button 1 = Audio internal/external tests. This test verifies the communication to devices internal and external to the audio system. While the tests are carried out, the display flashes SELF TEST. When the tests are completed, the display stops flashing and shows either SELF PASS or SELF FAIL. Failures can be viewed by pressing the tune up button to start the scroll through the list of faults. Each fault is displayed for 2 seconds. After the last fault is displayed, SELF FAIL is returned to the display.
     Internal/external self-test can be exited anytime by entering another diagnostic test.
   • Preset button 2 = VIEW/CLEAR DTCS. This test displays and allows the diagnostic trouble codes (DTCs) to be cleared. If no DTCs are found, the display shows NO DTCS. If any DTCs are present, the display shows DTCS FOUND and can be viewed by pressing the tune up button to start scrolling through the list of faults.
     To clear all DTCs, press the EJECT key. The display shows DTCS CLEAR.
   • Preset button 3 = SIGNAL STRENGTH TEST. This test displays the average signal strength of the currently tuned frequency.
   • Preset button 4 = Software version information. This test queries each radio system controller for its software version information. The software levels can be viewed by pressing the tune up button to start scrolling the various microcontrollers. After the last software level is displayed, the SOFT LEVELS message is returned to the display.
   • Preset button 5 = DISPLAY TEST. This test lights all the display segments for 5 seconds and then turns all segments off.
   • Preset button 6 = MODULE CONFIGURATION. This tests the audio unit configuration. The configuration can be viewed by pressing the tune up button.
   • CD button = CDX6 diagnostic mode. This test displays the last modes and errors that are saved in the memory. While these tests are being carried out, the audio unit displays CD DIAG. The modes and errors can be viewed by pressing the tune up button.

1. To exit the self-diagnostic test, turn the ignition switch off or the audio unit off.

1. NOTE: Turning the ignition switch off and back on may not re-enable the DVD player buttons.
   The audio unit self-diagnostic test disables the DVD player buttons. To re-enable the DVD player buttons, turn the audio unit off and back on. The headphone symbol lights up on the audio unit display to indicate the DVD player buttons are re-enabled.