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Home >> Cadillac >> 2013 >> Escalade EXT Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 1021 (Trailer Brake Control System) >> Diagnostic Information and Procedures >> DTC C1119 >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, observe the scan tool brake controls TBCM Relay Feedback Signal volts parameter. The reading should be between 4.8 - 5.2 volts.
  2. Ignition ON, observe the scan tool brake controls Trailer Brake Relay Command volts parameter. The reading should be battery volts.
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