this is a stupid question
neutral
In the UK the neutral wire is 'blue'.
blue and black
When ever there is a potential difference between it and ground.
you cut the yellow and black wire from the origanal plug and wire these from the CD player wire the yellow, red, blue, wire into the yellow and the black from origanal plug to black on CD player
The purpose of the blue wire on a thermostat is to connect the thermostat to the air conditioning system for controlling and regulating the cooling function.
In the UK Brown is the live, blue is the neutral and green/yellow is the earth. The live and neutral are the two wires that normally carry the current.
Green with Yellow Stripe Wire - Earth Wire (E) Blue Wire - Neutral Wire (N) Brown Wire - Live Wire (L) When you look at the plug with the terminals facing towards you: /\ / \ / E \ / \ / \ / L N \ ------------------
To properly wire a plug with 3 wires, you need to connect the live wire (usually brown), the neutral wire (usually blue), and the earth wire (usually green and yellow) to their respective terminals in the plug. Make sure to follow the correct wiring diagram and secure the wires tightly to prevent any electrical hazards.
The thermostat's blue wire may not be connected because it is typically used for cooling systems and may not be needed if your HVAC system does not have a cooling function.
The green and yellow is the earth wire The brown is the live wire The blue is the neutral wire A poem to help is: The brown live cow drinks from the blue neutral water and eats the green grass from earth
Pull the wire off the spark plug, pull the spark plug out, plug the spark plug back into the wire, then have someone turn the engine over. You should see a blue spark jumping around the very bottom of the spark plug.