Welcome to 2CarPros.
I have to start with saying this vehicle isn't offered in the US, so I have no specifics. However, since the third light is working, then the brake light switch is good. I will say this, often times the rear bulbs and the third light are on different circuits. If you are certain the bulbs are good, then recheck for a separate fuse for the rear brake lights.
Let me know if you find them.
Take care,
Joe
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Wednesday, September 11th, 2019 AT 5:49 PM