Wire tracing.

[f1steveuk]

I have a very useful lamp fitted at the bottom on some steps, and from what I can see, it is supposed to come on when the light drops below a certain level. I have powerd it up using an extension lead, so I know it works, and on removing the cover from the connectors, it is connected with one orange and one red wire. This dissapear into the wall and don't budge if gently pulled.

Going to the consumer board, there are quite a few wires that have been run, but not connected. Fortunately these are taped together in pairs, but nealy all the pairs are orange and red!!! It's impractical to connect each circuit loop to see which (if any) are the orange and red pairing I need to connect up, assuming they are all pairs, so how can I work it out!!?? (Fox & Hound wire tracer??)

[Quillan]

At a guess and it's only a guess that the orange wire is the 'switch' wire except it does not currently have a switch. You need to use a meter. First make sure you have disconnected the light from the wires behind that go in to the wall. Go to the fuse box and see if firstly there is any 220V AC on them, probably not but it pays to check. Then using your meter on Ohms setting see if there is resistance between the two wires at the fuse box. If there isn't go and link the two together that the light was connected to and return to your meter at the fuse board. If it shows a short then you know you have the right pair. If not well perhaps somebody else can come up with a suggestion. Good luck.