Things You'll Need
Instructions
Purchase an RF modulator. These devices are designed to add component audio/video hookups to a television that has none. These can be purchased at major electronics retailers like Radio Shack and Best Buy or on the Internet at places like Amazon.com and Overstock.com. The price varies wildly depending on your television model. Certain units cost as little as $15 while others range as high as $100 or more.
Screw the coaxial cable that connects your RF modulator to your television into your television's coaxial input. The cable running from the RF modulator will screw on to the coaxial input the same way something like a cable television box would.
Plug the red, yellow and white component audio/video cables from the Nintendo Wii into the appropriate red, yellow and white component audio/video inputs on the back of the RF modulator.
Make sure both the Wii and the RF modulator are plugged into wall outlets or power strips for power. Both of these devices run off of electricity provided to them by AC adapters. These adapters connect to each device and then plug into any standard wall outlet.
Turn on both your television and your Nintendo Wii. Tune your television to either channel 3 or channel 4 (you'll have to try both) to get the picture from the Wii. The audio and video signals will pass through the Wii into the RF modulator, at which point they will be displayed by the television set the same way they would if the Wii were connected directly to the TV.