2 ceiling lights on a single switch. HELP

[soundster]

Hi, I am having trouble replacing the ceiling lights after someone else disconnected all the wires from the ceiling and possibly altered the switch. I have bought a multimeter to try and trace the switched live ( i believe it is coming from the switch). Any help would be really appreciated as I am not 100% sure where they all were when it was working.

The single gang switch (2 way type) used to be a double gang but currently has 1 red com & a yellow and blue from L2, L1 is blank.

Next in chain is Light 1 with 3 sets of wires, 1st set is 2 core (black, red) and (i believe) is for light 2, 2nd set is (i beleive from supply) same type of wire (2 core (black, red) and I have attached a light to it and works but always on hence i reckon is supply. 3rd set confuses me as it is 3 core(i believe from switch) and has (despite some disclourment) red, yellow, blue.

Trouble is there are no markings to tell me which was the switched live and I cannot seem to "trace" them back together so they go back together as they were when working. Plus I am unsure as to the yellow and blue from the switch

If someone could give me some help, I would really appreciate it as so far this is the 2nd day with the ceiling bare!

 

[holmslaw]

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[soundster]

Thanks, I gathered they were switch lines 1 for each light , however i am stuck as to what they should be attached to on the supply's 2 core (black red) and also the 2nd lights 2 core
Sorry but am unsure as it wasn't me who touched them and no red sleeve for common live.

Thanks soo much for your help!

 

[holmslaw]

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[soundster]

i had connected the reds together (from switch & supply) no probs, I then connected the blacks from supply & 2nd light but tripped circut (with switch on and off) the only wire connected from 2nd light is black (apart from all earths are together)
i am bewildered right now and really appreciate your help!

 

[ban-all-sheds]

I then connected the blacks from supply & 2nd light but tripped circut (with switch on and off)

With lighting circuits not all blacks are neutral - some will be lives, so if you connect them to ones which are neutral you will trip the MCB.



//www.diynot.com/wiki/electrics:lighting

 

[soundster]

thanks, but the only black i have attached to supply black is one for 2nd light.

 

[holmslaw]

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[soundster]

ok, before i do though, i connected the supply black to the 2nd light red and no trip. or shall i start again?

 

[holmslaw]

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[soundster]

ok whats my 1st step? use meter to find switched live?

 

[holmslaw]

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[holmslaw]

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[soundster]

2 blacks i have are from supply & 2nd light. shall i connect them togerther now? i have connected all earths togerther already.

hmm that will be a no. ok. how do i go about tracing them correctly?

 

[holmslaw]

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