Radio works with no head unit installed? WTH?

[pahkah]

I just pulled the head unit to replace it with an upgrade, but to my surprise, the FM radio is still playing when I turn on the key. The steering controls work, both volume and channel. Where does the AM/FM receiver reside in my car? Apparently it's not in the HU. I'm about to do another Google search but I'm wondering if it's behind the C-Pillar, driver's side, down by the seat. Any thoughts? BAFFLED!

[Sdenhartog]

Interesting. I was surprised to find an external amplifier, when I put my new deck in. but FM radio?

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[Liquidity]

I’m assuming you have the satellite navigation unit in your car. That’s actually just an interface, everything is in the trunk. You also won’t be able to put a regular stereo in your car because none of the speaker wires are there, that plug has also been relocated to the trunk. You will need to get a patch cable on eBay, they’re like $35.

[pahkah]

I bought the patch cable as suggested by the manufacturer of the replacement unit I bought. Now everything makes sense. Thank you!

[MarcoZandrini]

Did the car come with factory navigation? If yes, all of the electronix are in the left side of the trunk. The “head unit” is merely a man-machine interface.