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Home >> Hummer >> 2010 >> H3T Alpha >> Repair and Diagnosis >> External Pages >> Different car >> Section 1770 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> Rear Seat Radio Controls Inoperative >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the X1 harness connector at the rear seat audio (RSA) controller.
  2. Test for less than 5 ohms between the ground circuit terminal 6 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Radio ON, test for battery voltage between the battery positive voltage circuit terminal 5 and ground.
    • If less than the specified range, test the voltage circuit for a short to ground or an open/high resistance.
  4. If all circuits test normal, replace the rear seat audio controller.
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