jacktrade

I am having a funny prob with my fridge freezer (BEKO ca45411ffs) Its stopped freezing and cooling etc. However,the fan in freezer works when switched on inside fridge at light fitment,,but the light dont come on.I`ve checked and the bulb works. When I checked ( voltage tester) the wires going to bulb fitment, I found the negative wire was showing a 110 voltage and the live was showing the correct voltage...no wonder the bulb wont come on. The power comes in correctly to the fitting, and is distributed when I turn on switch, but the neg gets this 110 voltage. Is this the reason the fridge is n