How to Wire a Hyundai Sonata Radio


The Hyundai Sonata has been in production since 1985. It is a popular and reliable car; however, older models may need an upgrade to their audio systems. Newer Sonatas come equipped with a remote amplifier, a digital display that Hyundai calls a command module and XM satellite capability. It is very unlikely that any wiring or upgrades would be needed in these cases. Older units, though, are very user-friendly for both stereo and speaker upgrades.

Things You'll Need

  • 1/4 inch socket set
  • Screwdriver set
  • Radio mounting kit
  • Wiring adapter kit
  • Pull off the radio trim panel. The Sonata has spring clips on the back of the panel. These clips push in with a snap and pull straight off with very little effort. On a few models, there may be some exposed screws that need to be removed, but the vast majority of trim panels will pull off.

  • Remove the radio. The radio has four screws that mount it in place, two on each side of the unit. Remove the screws and pull the radio out. Unplug the connectors and set the radio aside. Attach a wiring adapter kit by plugging in the connector to the existing wiring harness. This will allow you to install a universal, aftermarket radio without cutting and soldering the harness wires.

  • Install the radio mounting kit into the new stereo system. This kit allows for slide-in compatibility with the factory mounting requirements. The kit either snaps into place on the stereo chassis or is held in place by screws.

  • Install the radio and replace the trim. Plug in the wiring connectors and the antenna lead. Slide the unit into place and reinstall the four screws. Snap the trim bezel into place and test the radio for operation.

Tips & Warnings

  • It is far simpler and easier to use a wiring adapter kit. However, the new radio harness can be soldered into the factory wiring harness. The wire color-codes are as follows: Blue with Yellow stripes (Hot with the key in the "Accessory" position or with the ignition on), Yellow with Red stripes (Hot at all times for the radio's memory), Green with White stripes (illumination--night function), Green solid (electric antenna signal), two Black solid wires (Ground), Yellow and Black and Green and Black (left rear speaker), Yellow solid and Yellow and White (right rear speaker), Red and Blue and Green and Blue (left front speaker), Yellow and Brown and Green and Yellow (right front speaker).
  • If there are a large number of factory wires--more than 15 to deal with--when the radio is being replaced, the car is equipped with a factory amplifier. Double-check the entire system before proceeding and be certain the speakers are in good shape. The front speakers are easily replaced. The front grille covers can be quickly removed, and the front speakers are held in place by screws. The rear speakers are held in place from inside the car by bolts.

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