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Circuit/System Testing

  1. Ignition OFF, disconnect the GPS coaxial cable from the GPS antenna.
  2. Ignition ON, test for 4.0-5.5 volts between the center conductor and the shield of the coaxial cable.
    • If not within the specified range, replace the GPS antenna.
  3. Ignition OFF, test for less than 5 ohms or resistance at the GPS coaxial cable center conductor from end to end.
    • If greater than the specified range, replace the GPS coaxial cable.
  4. Ignition OFF, test for infinite resistance between the center conductor and the outer conductor of the GPS coaxial cable.
    • If less than the specified range, replace the GPS coaxial cable.
  5. If all circuits test normal, replace the radio.
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