One note for anyone installing one of these interfaces... Although the interface wiring harness has a wire marked "Illumination" it doesn't work. I checked the wiring diagram in the H2 service manual and the stock radio connectors don't have an illumination wire (the stock headunit illumination must be controlled over the Class 2 bus?). I ended up taking the illumination signal from the towing button illumination wire.
Something else to be aware of is the factory Bose amp rear input wiring is routed via the rear audio controller. If you disconnect the rear audio control you will not get any sound from the rear speakers. You either need to keep the rear audio controller connected, or connect up the correct wires manually at the rear audio control plug.
Mark
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