Hi, I really can't get my head around thid problem. I have a double switch. One switch controls the hall light and the other controls the exterior light. In the switch it looks like a straight forward loop circuit with 3 cables. 2 cables with 2 reds and ground and one with a yellow and blue cable (Both with red shielding on top) and a red also a ground. All the grounds are together. I have tested the exterior cables which are Black, Red and Ground. I'm getting current on live wire (Red) but not on Neutral (Black) whatever the switch position. It could well be that I have wired the switch incorrectly. Any help would be very gratefully appreciated. Thanks,

Steff

Neutral is not to have voltage between Neutral and Ground.You should have 120 volts between a Hot an a Neutral OR Ground(Bothe are connected together and at same potential. Current is something else and neutral current should equal current of Hot.