If it helps, my '94 Primer (G20 in U.S.) had the fog light switch and a couple of others mounted on the approx 12"x8" centre dashboard sub assembly held on by
4 crosshead screws. The screws were only visible looking up at the dashboard from a low viewpoint, i.e. you have to place your head somewhere near the bottom of the gear stick (shift lever?). With the screws out, the centre section can be wiggled loose and you'll see the switches mounted from behind by retractable plastic clips. The bulb may actually be a LED that may have a bad connection, but although the switch can be stripped down, I wouldn't recommend it as springs, contacts and ball bearings fly everywhere if you do it wrong. Probably easiest to buy another switch.
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