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Circuit/System Testing

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2015 GMC Yukon XL, 2015 GMC Yukon, 2015 Chevrolet Tahoe, 2015 Chevrolet Suburban, and 2015 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the radio antenna coax cable from the A11 Radio and from the T23 Radio Antenna Amplifier.
  2. Verify the antenna coax cable passes the coax cable component test. Refer to Component Testing.
    • If the coax cable does not pass the test 

      Replace the antenna coax cable

    • If the coax cable passes the test 
  3. Connect the antenna coax cable to the A11 Radio. Ignition ON, A11 Radio ON.
  4. Verify a test lamp illuminates between the antenna coax cable center terminal and ground at the T23 Radio Antenna Amplifier connector.
    • If the test lamp does not illuminate 

      Replace the A11 Radio.

    • If the test lamp illuminates 
  5. Test or replace the T23 Radio Antenna Amplifier.
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