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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1549 (Cellular Systems, Entertainment Systems & Navigation Systems) >> Diagnostic Information and Procedures >> Dual DVD Rear Seat Entertainment Headrest Wireless Headphones Malfunction >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Select both channels by switching the channel selector located on the side of the headphones and verify the volume is turned up. Also verify that the headphones are not in mute mode. Press the Sound Around ON/OFF button on the remote to change audio muting status.
  1. Ignition OFF, disconnect the appropriate seat headrest X2 connector at the monitor.
  2. Ignition ON, DVD playing, test for 15-40 mV A/C between the terminals on the monitor listed below and ground.
    • Right Audio Signal - terminal 3
    • Left Audio Signal - terminal 4
    • If the not within the specified range, replace the appropriate DVD display.
  3. Ignition OFF, reconnect the harness connector at the monitor.
  4. Disconnect the appropriate seat headrest X2 connector at the DVD control module.
  5. Ignition ON, DVD playing, test for 15-40 mV A/C between the terminals on the monitor listed below and ground.
    • Right Audio Signal - terminal 3
    • Left Audio Signal - terminal 4
    • If the not within the specified range, replace the wiring harness.
  6. If all circuits test normal, replace the DVD control module.
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