Hi,
The way this works is the gauge assembly gets a power feed from the fuse panel but the gauge assembly has an internal CPU that controls the lighting circuits. This means that if the D is the only one that is not working then you have an internal issue to the gauge assembly. Either it is the bulb itself or an issue on the driver circuit.
Unfortunately, it appears the only way to repair this is to take it apart or replace it.
Let me know if you have questions. Thanks
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Wednesday, October 9th, 2019 AT 4:40 PM