There's no grounds involved in the speaker circuits, and none of the speaker wire can be allowed to be grounded. There's roughly six volts on every speaker wire. The grounds involved with the radio and the amplifier affect all of the speakers at the same time.
There's two good suspects to start with. One is broken or frayed wires between the door hinges, and the other is a defective speaker. There's two versions of audio system for your model. The first two diagrams below are with a remote amplifier. The next two are for the radio without a separate amplifier. In both cases there's two speakers in the front doors. If there's a wiring problem, it's going to affect both speakers. Try to listen to the tweeter. If it sounds okay, the door wiring is okay. If both speakers are cutting out, slowly open and close the door while the problem is occurring. If you observe changes, we'll need to discuss the wiring repair.
If it looks like the speaker is suspect, the best approach is to switch them side to side, then watch if the one in the driver's door acts up or if it's still the one in the right door. If the speaker moved to the left door acts up, that's pretty definitive it needs to be replaced.
If you have the radio playing while you're unbolting the suspect speaker, another thing to try is rotating and tipping it. Often the angle it's sitting at causes a defect to act up or clear up. Sometime tipping a speaker causes it to start buzzing or popping too.
Let me know what you find.
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Friday, June 9th, 2023 AT 4:18 PM
