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- Remove the fuel pump assembly.
- With the float set to the full position, using an ohmmeter, measure the resistance between the sending unit and terminal Nos. 2 and 3.
- Resistance should be between 0.5-2.5 ohms. Replace the fuel level sending unit if measurement is outside of the specification.
- Using an ohmmeter, measure the resistance between terminal Nos. 2 and 3 while moving the float up and down. If the resistance does not change smoothly, replace the fuel level sending unit.