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Home >> Chevrolet >> 2002 >> TrailBlazer RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Ignition System >> Ignition Relay Diagnosis (4.3L) >> Test Description
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Test Description

The numbers below refer to step numbers in diagnostic procedure.

  1. 4

    This step is testing relay ground circuit.
  2. 5

    This step isolates circuit from IGN relay. All circuits at relay are good if test light illuminates.
  3. 9

    The open circuit will be between splice and IGN relay.
  4. 10

    Remove underhood electrical center cover and inspect circuits that are supplied a voltage by IGN relay.