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Home >> Cadillac >> 2007 >> STS Base, 4.6 A, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 13 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC B1283-B1286 >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2008 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the appropriate antenna harness connector at the TV tuner and the harness connector at the inoperative antenna amplifier.
  2. Test for less than 5 ohms of resistance between the two ends of the coax cable center conductor.
    • If greater than the specified range, replace the antenna coax cable.
  3. Test for less than 5 ohms of resistance between the two ends of the coax cable outer shield.
    • If greater than the specified range, replace the antenna coax able.
  4. Test for infinite resistance between the antenna coax center conductor and the outer shield.
    • If less than the specified range, replace the antenna coax cable.
  5. Connect the harness connector at the TV tunner.
  6. Ignition ON, TV ON, wait 20 seconds, test for more than 1 volt at the coax cable center conductor terminal 2.
    • If less than the specified value, replace the TV tuner.
  7. Ignition OFF, disconnect the harness connector at the appropriate TV antenna.
  8. Test for less than 5 ohms of resistance between the two ends of the TV antenna coax cable center conductor.
    • If greater than the specified range, replace the TV antenna coax cable.
  9. Test for less than 5 ohms of resistance between the two ends of the TV antenna coax cable outer shield.
    • If greater than the specified range, replace the TV antenna coax able.
  10. Test for infinite resistance between the TV antenna coax center conductor and the outer shield.
    • If less than the specified range, replace the TV antenna coax cable.
  11. Ignition OFF, TV OFF, connect the harness connector at the antenna amplifier.
  12. Ignition ON, TV ON, wait 20 seconds, test for more than 1 volt at the TV antenna coax cable center conductors.
    • If less than the specified value, replace the antenna amplifier.
  13. If all circuits test normal, replace the inoperative TV antenna.
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