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Home >> Cadillac >> 2009 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 409 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC B1289 >> Circuit/System Testing
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Circuit/System Testing

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  1. Ignition OFF, disconnect the harness connector at the rear video display.
  2. Ignition ON, test for 100-300 Hz at the control circuit terminal 9.
    • If not within the specified range, test the control circuit for a short to voltage, short to ground, or an open/high resistance. If the circuit tests normal, replace the radio.
  3. If all circuits test normal, replace the rear video display.
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