I try not to make posts like this, as I do recognise that you're looking for assistance in resolving a problem, but it's also important that you recognize your limitations, and the questions you're asking indicate that you are out of your depth on this.
No - a fuse can not cause this, fuses are fire protection devices - a fuse will not cause a fire, they are there to prevent them - mind you - when someone replaces a fuse with one with a higher rating a fire may result, but the fuse was not the cause. What you need to look for is melted insulation, in the area from which the smoke is coming.
I suggest you take the car to an auto electrician, and preferably not the one who did the work on the headlights - they would/should have known that the headlight repair (which deals with a specific connector) would not in any way be impacted by the wiper settings
Next - there is no "gun powder" in an airbag, talcum powder - yes, gun powder - no - you rarely find gun powder in ammunition any more, not unless you're dealing with antique firearms - and if you open up that steering column and trigger the airbag due to a lack of experience, there will be no lawsuit, or at least no settlement in your favour - there are specific handling procedures to be followed, you neglect to follow those procedures and you have no grounds for a suit.
93 - 1.3 Suzuki Swift GLX
98 - 1.8 Mitsubishi Pajero iO
98 - 2.0 Suzuki Grand Vitara