Going back to the light swtich issue... is the reason the wires tend to short because of the heat given off by the two bulbs inside the switch itself? Or is it the amount of voltage passing through that one particular brown wire, in which case would it not be better to locate the fuse closer to the other end of the cable rather than right next to the switch? Over the weekend I took the switch apart and replaced the two bulbs with 12V LEDs. It was a fiddley job but as a result the switch no longer gets hot, but should i still worry about this short circuiting issue?