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Electronic Control Unit Ground Circuit Check

  1. With harness connector removed from control unit, attach one ohmmeter lead to a good ground and the other to pin No. 5 of the control unit (not the harness connector cavity No. 5, but to pin on control unit).
  2. Ohmmeter should show full continuity. If not, make sure electronic control unit is making good contact at its hold-down bolts. If it is, replace control unit.
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