all of the my 1994 525i e34 switches light are not working, is there a way i could replace the light bulb? thanks

Check all of your fuses first.

It's usually the stupidest thing. Make sure you check ALL of them. And if there is one burnt out it's usually the last one that you check in the whole pack.

If that isn't it, it probably is either a loose wire or a wire grounding out.

check fuse all good, maybe burnt switch bulb? could you replace just the bulb not the whole switch?