Fuel Gauge: Testing and Inspection

Continue checks for at least two minutes each to correctly judge condition. Allowable indication error is twice the width of the needle.
1. Disconnect electrical connector from fuel gauge sender unit and connect red lead of checker 49-0839-285 to Yellow wire in connector and black lead to body ground.
2. Turn ignition switch to On position and proceed as follows:
a. Set the checker to 7 ohms. Gauge should indicate Full.
b. Set the checker to 32.5 ohms. Gauge should indicate Half Full.
c. Set the checker to 95 ohms. Gauge should indicate Empty.
3. If gauge indicates correctly, replace fuel gauge sending unit.
4. If gauge does not indicate correctly, repair wiring or replace fuel gauge.