Tacoma 4WD L4-2.7L (3RZ-FE) (2004)
INSPECT FUEL LEVEL WARNING SWITCH
a. Apply battery positive voltage between terminals 1 and 3, and through a 3.4 W test bulb, and check that the bulbs lights up.
HINT: It will take a short time for bulb to light up.
b. Submerge the switch in fuel and check that the bulb goes out.
If operation is not as specified, replace the sender gauge.