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Circuit/System Testing

WARNING: This page is about a different car, the 2009 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the ESC module.
  2. Ignition OFF, test for less than 3 Ω of between the ground circuit terminal 47 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 32 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for an open/high resistance.
  4. If all circuits test normal, replace the ESC module.
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