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Symptom Chart - Speakers and Sound Quality

WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
Condition Possible Sources Action
Poor sound quality or distorted sound from one or more speakers (not all speakers) Refer to the Pinpoint Test GO to Pinpoint Test D .
No sound from all speakers Refer to the Pinpoint Test GO to Pinpoint Test E .
A loud popping sound is heard from the speakers when cycling the ignition Refer to the Pinpoint Test GO to Pinpoint Test AV 
The speed compensated volume does not operate correctly Refer to the Pinpoint Test GO to Pinpoint Test C .
The instrument panel center speaker is inoperative Refer to the Pinpoint Test GO to Pinpoint Test L .
The LF door speaker is inoperative Refer to the Pinpoint Test GO to Pinpoint Test F .
The RF door speaker is inoperative Refer to the Pinpoint Test GO to Pinpoint Test G .
The LF tweeter speaker is inoperative Refer to the Pinpoint Test GO to Pinpoint Test H .
The RF tweeter speaker is inoperative Refer to the Pinpoint Test GO to Pinpoint Test I .
The RR door speaker is inoperative Refer to the Pinpoint Test GO to Pinpoint Test K .
The LR door speaker is inoperative Refer to the Pinpoint Test GO to Pinpoint Test J .
The LH or RH D-pillar speaker is inoperative Refer to the Pinpoint Test GO to Pinpoint Test M .
The subwoofer speaker is inoperative Refer to the Pinpoint Test GO to Pinpoint Test N .
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