I was as following this post. Lots of good info and saved me some time.
I had a similar problem. Dimmed the first time and then not. They are nice and bright but I did buy the dimmable feature. I chatted with Suberbrite and they suggested reinstalling 1 old style bulb so the dimmer has enough current draw to work. I said “what”. How come no one has complained about that? They suggested the odometer location to reinstall the old bulb. I will have to give it a try.
I did notice the top left side of the tach was not as bright. Probably the way it’s designed but I will look at that too.
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