Integral Audio SoundStage + Subwoofer System Installation Manual page 9

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[sub ONLY]
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16. signal wiring (Overview)
The factory audio signal is obtained from the X9331 connector in
the driver-side footwell, described below. The X9331 T-harness
portion of the signal wiring harness plugs into each side of the
factory connector, and sends the signal to and from the new ARC
amplifier in the rear. The 'remote volume' branch of the harness
is routed to the center console.
17. access x9331 & x15 cOnnectOrs
Locate these connectors in the left footwell, above the dead pedal.
The X9331 is behind and attached to the larger X15. Remove
both by twisting counter-clockwise ¼ turn and pulling outwards.
Separate the X9331 from the X15 by releasing the locking tabs on
the connector joining them.
18. cOnnect x9331 t-harness
Unplug the factory X9331 connector and connect the T-Harness
19. rOute reMOte vOluMe cOntrOl caBle
[SUB ONLY]
[NOTE: IF YOU PLAN TO INSTALL THE SUBWOOFER LATER, GO
AHEAD AND RUN THIS CABLE NOW]
Locate the Remote Volume control cable. Pull firmly on the top of
the plastic panel under the steering wheel to release the top edge
of the panel. Feed the Remote Volume cable along and under the
knee bolster.
20. reMOve fOOtwell panel
[SUB ONLY]
Remove the panel next to gas pedal by releasing the Torx T-25
screws (some vehicles have phillips head screws) and pulling the
panel out and towards the rear of the vehicle.