Circuit/System Testing

WARNING: This page is about a different car, the 2016 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

Ignition OFF, disconnect the radio antenna coax cable from the A11 Radio and from the Radio Antenna Amplifier/Module.
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
Connect the antenna coax cable to the A11 Radio. Ignition ON, infotainment system ON.
Verify a test lamp illuminates between the antenna coax cable center terminal and ground at the Radio Antenna Amplifier/Module connector.
- If the test lamp does not illuminate
  Replace the A11 Radio.
- If the test lamp illuminates
Test or replace the Radio Antenna Amplifier/Module.