How to Connect GPS to an Auto Stereo

by Rachael Smithey

Many automotive GPS devices offer the ability to store and play audio-book and music files. If your GPS includes an FM transmitter or modulator, you can create a wireless connection between the GPS and your auto stereo. If your GPS does not include an FM transmitter or modulator, you can create a wired connection between the two devices with a standard audio cable.

FM Transmitter (Garmin GPS)

1

Select “Volume,” “Audio Output,” then “FM Transmitter” to display the “Frequency Adjust” screen.

2

Select an unused (no broadcast) FM station on your car radio.

3

Press the "+" or "-" buttons on your GPS to select the same station.

FM Modulator (Magellan GPS)

1

Select “Main Menu,” “Settings,” “Sound,” “FM Modulator.”

2

At the warning alert, press "Yes."

3

Select “Modulator Settings.”

4

Select an unused (no broadcast) FM station on your car radio.

5

Press the “Tune” up and down arrows to select the same station.

Audio Cable (Garmin or Magellan GPS)

1

Plug one end of a male-to-male 1/4-inch jack audio cable into the audio output port of the GPS device.

2

Locate the "Aux-in" (auxiliary input) port on your car stereo. Most car stereo "Aux-in" ports are located on the stereo faceplate.

3

Plug the other end of the 1/4-inch jack cable into the "Aux-in" port of your car stereo.

4

Select the "Aux-in" mode on your car stereo.

Tip

  • Obtain a cassette adapter for the wired method if your car stereo has a cassette player in place of an auxiliary input port.

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About the Author

Based in Southern California, Rachael Smithey has been writing professionally since 2002. She has written for About.com (Guide to Macs) and Suite101.com (Contributing Editor/Course Developer for Microsoft Office 2000). Smithey holds a Master of Science in information systems and a Master of Library Science from the University of Maryland.

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