How to Amplify a Car Radio Antenna

Written by nichole liandi
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Amplifying a car radio antenna is accomplished by connecting an in-line amplifier into the transmission line of the antenna, before the signal is fed to the car radio. These devices are equipped with inputs and outputs so that can be incorporated into the transmission line without splicing. They also feature power and ground wires so they can tap into the car's 12-volt electrical system.

Skill level:

Things you need

  • In-line antenna
  • Screwdriver or wrenches

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  1. 1

    Unplug the antenna cable from the back of the radio. The antenna cable is the black cable with a silver-coloured metal plug on the end.

  2. 2

    Plug the male end of the cable attached to the antenna amplifier into the car radio's antenna jack. This is the jack you removed the antenna plug from in Step 1.

  3. 3

    Plug the antenna cable you unhooked in Step 1 into the female connector on the antenna cable attached to the antenna amplifier.

  4. 4

    Route the antenna amplifier's red power cable to the fuse box of the car. Insert the end of the antenna amplifier's power cable into an unused fuse slot.

  5. 5

    Route the antenna amplifier's black ground cable to a metal screw or bolt attached to the body of the vehicle. Loosen the screw or nut and slide the ground cable underneath. Tighten the screw or nut to hold the end of the wire.

  6. 6

    Slide the power switch of the amplifier to ON when using the amplifier.

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