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Remove the black wire (it is called the switch leg in this case) that is connected to the bottom screw on the old switch and connect it to to the _black_ screw on the new switch. Then remove the red and white wires from the old switch and connect them one to each gold screw on the new switch. The red and white wires are the "travelers" and it doesn't matter which wire goes to what screw as long as you are connecting both to the _gold_ screws. The "odd screw out" is always the switch leg or hot.
If the switch box is metal you'll need to attach a (green or bare) wire from the green screw on the new switch to the box with a green screw. There are grounding clips available if the holes in the box are not threaded. Or use a 10-32 tap to thread the hole.
Please remember to turn off the circuit and be _sure_ it is OFF. Turn off the main breaker and work with a flashlight if you can't determine which circuit breaker to turn off.
First, let me say that if you're not entirely comfortable doing high voltage electrical work, you might want to call an electrician. It's not impossible for you to get hurt or killed or burn down your house. At least be sure to turn of the circuit breaker while you're working on it.
The blacks and whites twisted together are passing through power to other parts of your premises and are always on, so be sure to keep them twisted together. The red is the one that will take power from your light switch and send it to your light fixture.
At the fixture, connect the white to white and red to black, the same as before. At the light switch, connect the black to one side of the switch and the red to the other. When you turn on the switch, it will permit power from the black to travel down the red to the fixture, and from the fixture, the circuit will be completed through the white.
Did it work before? Is this a new install? Try replacing the cable with a known to be good one. You may have used a "crossover" cable by accident, in which case it won't work at all. You need a "patch" cable. Sometimes the wires connected inside the wall jack can get loose. Pull the wall jack and inspect the wire connections. Use a small screwdriver to push the wires into the slots if any look loose.
It's possible that the network adapter (NIC) drivers are corrupt. Check "device manager" to re-install the driver. Also, the router may be misconfigured.
Sometimes this problem can be solved by shutting down the computer, then pulling the power cable on the router and let it sit unpowered for a minute or so. Then re- power up the router. Once the lights are green, boot the computer and it should come up.
if it is led it most likely is a low volt and very low amps. you can go behind the radio and find the switched wire using a test light when you turn on car the test light will light you want to use this wire and splice it in using the blue scissor type splicers no cutting or soldering required. This wire will be close to the black and red wire going into radio. Possibly a red wire as well if there are two red wires one might be switched and one always on for retaining clock or radio stations in memory.