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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 242 (Engine Controls - System & Component Testing - 4.8L, 5.3L & 6.0L - Flex Fuel & Gasoline) >> Fuel Systems >> Fuel Pump Electrical Circuit Diagnosis >> Test Description

Test Description

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The numbers below refer to step numbers on diagnostic procedure.

  1. 3  - This step determines if condition is located on coil side or on switch side of fuel pump relay.
  2. 4  - This step verifies that 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 a voltage is constantly being applied to fuel pump relay.
  5. 13  - This step determines if condition with circuit is intermittent.
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