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Home >> Chevrolet >> 2002 >> Astro Van Passenger, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Fuel System (Diesel) >> Ignition (Glow Plug) Relay (6.6L) >> Test Description

Test Description

The numbers below refer to step numbers in diagnostic procedure.

  1. 4

    This step tests Ignition 1 Relay Control circuit from ECM.

  2. 5

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

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