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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1557 (Engine Controls And Fuel - 2.4L (Lat) - Troubleshooting & Diagnosis) >> Fuel Pump Electrical Circuit Diagnosis >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Measure for 70-110 ohms of resistance between terminals 85 and 86 of the fuel pump relay.
    • If the resistance is not within the specified range, replace the fuel pump relay.
  2. Measure for infinite resistance between the following terminals of the fuel pump relay:
    • 30 and 86
    • 30 and 87
    • 30 and 85
    • 85 and 87
    • If continuity is detected, replace the fuel pump relay.
  3. Connect a 15A fused jumper wire from the positive terminal of the battery to relay terminal 85. Connect a jumper wire from the negative terminal of the battery to relay terminal 86. Measure for less than 2 ohms between terminals 30 and 87 of the relay.
    • If the resistance measures more than 2 ohms, replace the fuel pump relay.
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