Inspecting the Fuel Level Sender Component

sd mm 47.04.004
  1. Inspect the fuel level sender wiring harness for signs of loose connections or damage. Look for cracking or signs of moisture intrusion.
  2. Inspect the fuel level sender box (Fig., Item 6) for signs of leaks or damage. Ensure that the retainer clips are installed on the mounting ears.

    1. Pressure Control Regulator

    2. Vapor Shutoff Valve

    3. Fuel Fill Hose

    4. Secondary Relief Valve (red cap)

    5. Fuel Fill Fitting

    6. Fuel Level Sender Box

    7. Primary Relief Valve

    8. Tank Pressure Gauge

    9. Fill Vent Fitting

    10. Excess Flow Valve

    11. Fuel Shutoff Valve (liquid)

    12. Fill Check Valve

    Fig. 1, Fuel Tank Plumbing Components

  3. Inspect all connectors and wiring for signs of loose connections, damage, or chafing.
  4. Turn the ignition switch to the ON position and check for fuel gauge response.
  5. Repair or replace any damaged fuel gauge components.
Note:
Parent topic: LNG Fuel System Inspection
Document Number: 0000120397
Manual Publication Date: 2024-05-23
Topic Publication Date: 2025-07-31