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Is the "TEL Adapter" unit required?

I'll start with the usual disclaimer that I searched and couldn't find anything specific to my question. I'd like to know if, when switching to an aftermarket head unit, do

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Old 03-02-2021, 02:07 PM   #1 (permalink)
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Default Is the "TEL Adapter" unit required?

I'll start with the usual disclaimer that I searched and couldn't find anything specific to my question.

I'd like to know if, when switching to an aftermarket head unit, do I need to keep the TEL Adapter Unit? (The "white box" that's on the same bracket as the base model stereo)

I looked at the pinout in the FSM in detail, and I could only find a few places where it may be needed:
  1. Telephone integration. Obviously this would be disabled.
    Also just as obvious should be that I would not be needing it with an aftermarket headunit
  2. Bluetooth antenna. I would also not use this in an aftermarket head unit
  3. OEM microphone. I will but using the mic that came with the head unit
  4. Steering wheel controls. This one is interesting. I see that the steering wheel controls are routed through the TEL Adapter into the factory stereo. I'm guessing this is only to get the telephone steering wheel controls (but maybe volume as well?). If I get rid of the TEL Adapter unit can I just use the signal that goes INTO the unit from it's connecter without plugging in the unit? I'm guessing yes, but I'm not sure.

Does anyone have any experience with deleting this box? It frees up a lot of space that I'd like to use back there.
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Old 03-03-2021, 03:29 PM   #2 (permalink)
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Yes, you need to keep it.
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Old 03-03-2021, 11:45 PM   #3 (permalink)
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Thanks for the reply. I actually tried it earlier just to see, and learned that climate controls don't work without the box. It's interesting that box called "TEL Adapter Unit" by the FSM is needed for climate controls. I eventually found posts about this. It turns out if I searched for "white box" instead of "TEL Adapter Unit" then I would have found the responses.
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Old 03-15-2021, 01:07 PM   #4 (permalink)
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If you want to use the phone buttons yes. If not no
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