I have replaced a light switch in the hall without making a note of which wire goes where. I have wired it the same as the unreplaced one, but it trips when I switch the light on. There are 2 black wires and 1 red. Each switch has provision for 3 wires,1 marked common, at the top, and 2 at the bottom marked one way and two way. The unreplaced switch has the red wire in the common connector, and the black ones are in the bottom ones marked one and two way. What am I doing wrong????
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Re: 2 way light switches in the hall
There are too many ways to wire a 2 way switch circuit (3 way switch) to mess with, the two most common ways, will trip out the circuit if wired to each other, (one kind at each end, hope that makes sense), the most common mistake, will put 110v to the metal plate of the switch and switch box, not good
a sparky will take 5 minutes to determine which wiring pattern is used, and install the switch
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Remove timer, and reconnect both switches as they were before starting. Notice if there is a wire that connects to both switches... this will be the Hot wire. Then notice that the 2-way switch has two wires. One wire will be Hot > and this wire connects to timer Black wire. And the other wire goes to Load (light) > and this wire connects to timer red wire. The timer green wire connects to bare ground wires. This leaves the timer White wire > you can connect timer White wire with the other ground wires.... > or look in the back of switch box to notice a group of white wires covered with wire nut > connect timer White wire to these other white wires. http://waterheatertimer.org/How-to-wire-timers.html http://waterheatertimer.org/Woods-timers-and-manuals.html#59018
A switch loop is a technique that is often used in home wiring to cut back on wire used and to make the circuit less complicated. In a normal switching circuit power comes into the switch box with the white wires tied together and black wires on the switch and then continues to the lighting box where black is connected to black and white is connected to white. With a switch loop the power starts at the lighting box in the black wire that does not go to the switch. That black wire is connected to the white wire that goes out to the switch (note the white wire must be taped with a small piece of electrical tape to show that it is now a powered wire). At the switch both black and white wires must be connected to the switch (the white wire here must also be taped). So now back at the light box you should have two wires. A white wire from your incoming power cable and a black wire from your switch cable. Now all you need to do is tie black to the black of your light and white to the white of your light (note: if you have terminals, white goes to the silver terminal and black goes to the brass terminal.) The wiring is done in this manner because in electrical work black and white make a light, and the the colors are never mixed up because it allows the next person to diagnose any problems much easier.
At this point either. Once you hook up the switch test the switches on both sides. Make sure each one turns on and off if that makes sense. If the blue wires are on wrong one switch will only work if the other one is on. If that happens reverse the blue wires and that should fix it.
Hello. I can help you. Assuming that all three switches used to work and now you have this problem, you have a switch that is worn out or has a wire that has come loose.
Turn off the power to this fan and open up one switch at a time. look for a disconnected wire, or a loose wire. If the wires were pushed into the clip on the switch check carefully as these little clips often fail after a while.
I seriously think you will find a loose wire and that will solve your problem, once you reconnect it.
If that is not the case, you will have to replace one switch at a time until you have replaced the bad one.
I recommend that you make a diagram of each switch once you have it out in the open noting which color of wire goes to each screw or spot. You will always have one screw on a switch which is a slightly different color from the rest. Always note which color wire goes to the odd color screw and make sure you always hook that wire to the odd color screw in the new switch.
You cannot, at least not using the dimmer you have in your hand. The switch with all the wires is a four-way switch, which is used to make a "suicided" 3-way switch. The power comes in AND goes out to the light from that switch. The other switch is a 3-way. Neither one has the "ON" or "OFF" marks on them, do they? You can buy a 3-way dimmer, but i do not know if rotary-style 3-way switches exist. You will have to install the dimmer at the other switch because i am quite certain no 4-way dimmers are available.