Fog Light Switch-front Dash

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Hi there to all.....I'm a newbie here so go easy.....

I recently picked up a Jap import Carina E GLi 1.6......fog light switch does not appear to be working....it does not light when depressed/pushed in......headlights on dip/dim, engine running.....swapped for another switch, checked bulb s in both......still nothing...I'm guessing it's possibly an open-circuit wiring fault somewhere.......anyone any ideas on anything simple I may have overlooked before I go rooting in the car innards...and anyone any advice on a painless and hair-preserving method of tracing the wiring fault also?

Cheers and thanks

Jonny