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Circuit/System Testing

  1. Ignition OFF, disconnect the X1 and X3 harness connector at the K9 Body Control Module.
  2. Test for less than 0.3 V at the K9 Body Control Module signal circuit harness terminal 9 X1 and ground.
  3. If greater than the specified value, test the signal circuit for an short to voltage
  4. Test for less than 0.3 V at the K9 Body Control Module 12 V reference circuit harness terminal 4 X3 and ground.
  5. If greater than the specified value, test the 12 V reference circuit for a short to voltage.
  6. Test for infinite resistance between the K9 Body Control Module signal circuit harness terminal 9 X1 and ground.
  7. If lower than the specified value, test the signal circuit for a short to ground.
  8. Test for infinite resistance between the K9 Body Control Module 12 V reference circuit harness terminal 4 X3 and ground.
  9. If lower than the specified value, test the 12 V reference circuit for a short to ground.
  10. Press and hold the rear fog lamp switch button.
  11. Test for 2.0-2.4 kΩ between the K9 Body Control Module 12 V reference circuit harness terminal 4 X3 and the K9 Body Control Module signal circuit harness terminal 9 X1.
  12. If all circuits test normal, replace the K9 Body Control Module.
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