Help with wiring a light

[Bobob123]

Firstly - hands up - I didn't take any notice when I removed the last light so now have issues with my wiring.That's where I need your help. The issue is that with the way I have currently wired the light in the bathroom it works but the bedroom light switch also switches it on and off and the light in the bedroom doesn't come on. From the attached picture of the wiring what do I need to do to correct it so that (1) the light switch in the bedroom doesn't have any control of the bathroom light, (2) the light in the bedroom actually works, and (3) the light in the bathroom continues to work. Many thanks in advance.

 

[ban-all-sheds]

You basically have to choose between Plan A and Plan B.

PLAN A:

• Learn how lighting circuits are wired.
  • //www.diynot.com/wiki/Electrics:Lighting
  • http://wiki.diyfaq.org.uk/index.php/House_Wiring_for_Beginners#Lighting
    
  • http://www.google.co.uk/search?q=uk+lighting+wiring+(basics+OR+101)
  • //www.diynot.com/wiki/Electrics:books
  • //www.diynot.com/wiki/Electrics:index
• Get a multimeter and learn how to use it.
• Identify which conductors are which at the switches and the light positions.
• Work out what should go where and connect everything up properly.

PLAN B:

• Get an electrician.

There are some irresponsible people here who will tell you that there is a Plan C, which is to start trying different things without really knowing what's going on, hoping to get it working by luck, or by blindly following instructions to put-this-wire-in-that-hole without any idea as to why. Please don't listen to them - you must know what, and truly understand what, you are doing.

Electrical-installation-by-guesswork is a foolish idea.

There is no Plan C for anybody sensible

 

[sparkwright]

What's that piece of tape on one of the blacks?

That could be a clue...

 

[Bobob123]

Hi guys. Thanks for the replies. I put the insulation tape on it because there was a break in the casing.

 

[ericmark]

What is likely is the black wires are wrong.
So likely black wires are.
a) Neutral in
b) Neutral to bed room
c) switched line
So if instead of the two neutrals together you have neutral to bedroom and switched line together then the bedroom light will not work as it has no neutral, but the bathroom one will.

So you have to work out which is neutral to next lamp and which is switched line, easiest and safest way is with power off using a multi-meter or other unit to bell out the switched line, however removing the neutral feed to next lamp will not stop bathroom light from working, so removing one of the pair of blacks will have no effect, and the other with stop bathroom light working, the latter will be switched line and should have red tape on it.