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Home >> Cadillac >> 2013 >> Escalade Base, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Antilock Brake System - Hybrid) >> Diagnostic Information and Procedures >> DTC C056D, C121C, C121E, C121F, C123A-C1256, C126E-C127C, C12C2-C12DB, C12DE, C12DF, or C12F2-C12F6 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF, disconnect the harness connector at the EBCM.
  2. Test for less than 1 Ω between the ground circuits listed below and ground.
    • Terminal 13
    • Terminal 38
      • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between the B+ circuits listed below and ground.
    • Terminal 1
    • Terminal 25
      • If the test lamp does not illuminate, test the appropriate circuit for a short to ground or an open/high resistance.
  4. If all circuits test normal, replace the EBCM.
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