Circuit/System Testing

Ignition OFF, disconnect the radio antenna coax cable from the A11 radio and from the T4G antenna.
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 radio antenna coax cable to the A11 radio.
Ignition ON, A11 radio ON. Verify a test lamp illuminates between the antenna coax cable center terminal and ground at the T4G antenna.
- If the test lamp does not illuminate
  replace the A11 radio.
- If the test lamp illuminates
Test or replace the T4G antenna.