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Home >> Chevrolet >> 2002 >> C3500 HD 8.1 G, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Fuel System (Gasoline) >> Fuel Pump Relay (5.0L & 5.7L) >> Test Description
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Test Description

The numbers below refer to step numbers in diagnostic procedure.

  1. 2

    This step determines if condition is current.
  2. 4

    This step verifies PCM is providing voltage to fuel pump relay.
  3. 5

    This step tests for an open in ground circuit to fuel pump relay.
  4. 6

    This step determines if voltage is constantly being applied to fuel pump relay.
  5. 13

    This step determines if condition with circuit is intermittent.
  6. 15

    This step determines if fuel pump will operate while bypassing fuel pump relay.