First of all, from the past few message, the bulb will certainly be working, it’s a tiny thing like a 508t 1w ish 12v powered at 6volts that is ultra dim, to add insult it’s also got a blue cap on it so you can’t see it! Can’t see there being a specific fuse for it, it’s more likely to be tied in with some ecu or some lighting circuit with it not been 12 volts. On testing I imagined it would’ve increased voltage by raising the dash brightness but it didn’t, at a guess that’s how it should’ve worked but as it’s all CAN and digital dash now it’s just set at a low voltage.
As it’s low volts anyway I pre wired an LED white w5w that I had, and wired it straight to an ignition feed, I have various bits of illumination anyway.
To get to it is quite hard it’s a strip down fo the consult sides and top which isn’t to bad but getting underneath the shift was a pain. I would only recommend if you are competent at striping stuff down. Putting the shift back together is just as fiddly!