Dual DVD Rear Seat Entertainment Headrest Video Does Not Synchronize. GMC Truck Yukon Denali 2007

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2007 🢒 Yukon Denali 🢒 Driver Information and Entertainment 🢒 Cellular, Entertainment, and Navigation 🢒 Dual DVD Rear Seat Entertainment Headrest Video Does Not Synchronize

•	Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

•	Review Strategy Based Diagnosis for an overview of the diagnostic approach.

•	Diagnostic Procedure Instructions provides an overview of each diagnostic category.

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Important: Before performing this diagnostic verify that both DVD displays turn on and operate normally. If one or more displays are inoperative, go to Dual DVD Rear Seat Entertainment Headrest Display Inoperative - One or More .

Turn ON the ignition, Press the power button on one of the displays and insert a DVD. Operate the DVD player in play mode.
Press the power button on the other display. Press the source button to view the DVD video playing on the adjacent display. Verify that the video displays do not synchronize.

⇒	Test or repair the suspect video in/out signal circuit for a short to B+, short to ground or open circuit. If all circuits test normal replace the DVD control module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Refer to the accessory installation instructions for replacement.