3rd Button for RearDefrost/Hazard? [Mystery Button]

[Boost Era]

The only reason I stumbled on this OLD post is because I needed another cluster frame and found one that came with buttons intact. I am just showing what I found… first to answer a questions that I saw earlier, this is for the roof

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[Boost Era]

And this is the simple breakdown. I was hoping to use an existing switch for a kill switch but will probable end up putting a toggle in the blank button

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