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cilynx / expedition

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Driver's door speaker is dead #6

Open cilynx opened 1 year ago

cilynx commented 1 year ago

I think the speaker actually is dead as opposed to being a problem with the head unit as all of the rest of the speakers work. Need to test the speaker itself first and go from there.

cilynx commented 1 year ago

It's not the woofer as when I swap the front door woofers, the LF woofer stays dead and the RF woofer stays working. The LF tweeter kinda works if you crank the volume. It vaguely works and crackles a lot.

The factory wiring is a spaghetti nightmare. The rear speaker wires from the head aren't even connected to anything. The front speaker wires from the head run all the way back to the DSP on top of the driver's rear wheel well. The DSP splits the "front" signal out to all of the speakers, including doing the crossover for the separate woofer and tweeter components.

Since all the other Left speakers work, the wiring from the head to the DSP must be good.

At this point the problem could be the DSP itself or the wiring from the DSP to the driver's door speakers.

2017 Ford Expedition Sony Sync Stereo Wiring Diagram 1 of 4

cilynx commented 1 year ago

After some more troubleshooting for #4, I'm 95% sure the DSP is bad and swapping it out (easier said than done) will likely get me this channel back.

cilynx commented 1 year ago

Grabbed a new-to-me DSP on eBay for <$100 -- looks like Ford used FB5T18B849AH / FB5T18B849AG in a bunch of different models. Not sure what the difference is between the H and G models, but the one I picked up came out of the same year and model as my truck. Now I just have to wait for it to get here.

cilynx commented 1 year ago

Connected the new amp and the driver's door is still dead, even with a known-good speaker. Back to the drawing board.