Circuit/System Testing
NOTE:
The global positioning system (GPS) requires a clear line of sight to the sky to operate properly. It may take up to 15 minutes for the Nav Radio to acquire a GPS signal. In most cases the GPS will not have reception near tall buildings or inside structures.
- Ignition OFF, disconnect the GPS antenna coax cable from the navigation radio.
- Ignition ON, test for 4.5-5.5 V between the coax cable center conductor terminal at the radio and ground.
- If not within the specified range, replace the radio.
- If all circuits test normal, replace the GPS antenna.