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Circuit/System Testing

WARNING: This page is about a different car, the 2012 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, Retained Accessory Power OFF, disconnect the harness connector X4 at the K9 body control module.
  2. Test for 120-160 Ω between control terminal 14 and ground.
    • If less than the specified value, test the control circuit for a short to ground. If the circuit tests normal, replace the X50A underhood fuse block.
    • If greater than the specified value, test the control circuit for an open/high resistance or a short to voltage. If the circuit tests normal, replace the X50A underhood fuse block.
  3. If all circuits test normal, test or replace the K9 body control module.
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