Figured out how to run my own speaker wires to the rear doors using the factory connector inside the grommet. No snaking wire through taped up looms and grommets.
You have to have a multimeter to find out which wires on the door side of the connector map to the speaker connector.
Then you have to find the corresponding wires on the cab side of the connector and release the terminals.
Then get the same terminals and crimp them to your own speaker wire.
Main benefit: this isolates the rear and hatch speakers from the series wiring, so you can run rears and hatch speakers they way you want with plenty more options and choices.
Hatch: Ran my own wire to the hatch speakers as well. Had to snake through the grommet there.
Sub: Had a custom ring spacer/adapter made to mount the JL Audio sub to the factory enclosure.
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