Fm modulator help.

Im installing an fm modulator on a stock radio on an f150.With the rca jacks on the modulator how do i go about  installing it to get sound.

All you need to do is to use a volt meter and find the 12 volt switched wire and the ground wire from the radio. Take the ground wire and attach it to the ground wire from the radio. Then do the same with the 12 volt switched wire. Unplug the antenna from the radio and plug it into the input on the modulator. Then take the other antenna coming off of the modulator and plug it into the radio. Then just tune the radio to the right channel and enjoy. Good luck with thwe install.Brianowner/installerSight & Sound Car Stereo