Supercharged

I bought a new rear fog switch and fitted it but it has made no differrence.

The rheostat was the first thing that i tried, i have since noticed that turning it has no effect on the radio or heater display so i may try taking it out to see if it is faulty. I still can't understand why the rear fogs wouldn't work though

Can anyone please help? I have a 54 plate IS200 Sportcross with a dash board lights fault. All the lights stopped working a couple of weeks ago and can't find the problem, the items I have checked are listed below. At the same time the rear fogs have stopped working though the light bulbs are fine. All fuses i can find (both sides inside the car and under the bonnet) are working fine The Rheostat is still working on the radio & air con displays Replace rear fog switch, still the fogs and dash lights will not work. All the dash bulbs have been checked and are ok Any ideas?