Simple Test

Disconnect fuel gauge sending unit connector wire in luggage compartment, in cargo space or at tank unit. Connect a 12-volt, 3.4-watt bulb to harness side of connector, between appropriate terminals. See Fig 1 - Fig 3 .
Turn ignition switch to ON position. Ensure test bulb flashes, or stays on, and fuel gauge needle moves. If bulb or gauge needle does not function as described, check and repair fuel gauge circuit.

Fig 1: Identifying Main Fuel Sender Gauge Test Connections (Colt Vista 4WD, Expo 4WD & Summit Wagon 4WD)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 2: Identifying Sub Fuel Sender Gauge Test Connections (Colt Vista 4WD, Expo 4WD & Summit Wagon 4WD)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 3: Identifying Fuel Gauge Test Connections (Colt, Colt Vista FWD, Expo FWD, Mirage, Summit & Summit Wagon FWD)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

NOTE: Fuel gauge resistance test must be completed with instrument panel cluster removed. Use ohmmeter for all measurements. If resistance is extremely low, a short may exist in coil. If resistance is extremely high, a broken wire or similar problem may exist in gauge.