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The factory wiring uses a Quadlock plug.

Models with this unit were either non-amplified, rear amplified or full BOSE amplified. You can identify BOSE by the speaker grills having the logo on there. 

You can identify the system from the 8 pin speaker block in the quadlock. Fully pinned means non-amplfied, 4 pins means rear amplified and no pins means fully amplified.

Navigation Plus RNS-E

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