Circuit/System Testing

Antenna Circuit Testing

1. Ignition OFF, disconnect both ends of the coax from the radio and radio antenna.
   IMPORTANT: For steps 2-5, perform the tests on each of the disconnected coax cables.
2. Test for infinite resistance between the antenna coax center terminal and ground.
   • If less than the specified value, replace the antenna coax.
3. Test for less than 5 ohms on the antenna coax center terminal from end to end.
   • If greater than the specified range, replace the antenna coax.
4. Test for less than 5 ohms on the antenna coax outer shield from end to end.
   • If greater than the specified range, replace the antenna coax.
5. Test for infinite resistance between the coax center terminal and the outer shield.
   • If less than the specified value, replace the antenna coax.
6. If all circuits test normal, replace the antenna.
7. Ignition ON, radio ON, verify radio reception has improved.
   • If there is still poor reception, replace the radio.