Fuel Gauge Simple Test

Disconnect fuel sending unit connector wire in luggage compartment, cargo space or at tank unit. Connect a 12-volt, 3.4-watt bulb to harness side of connector, between power terminal and ground. See Fig 1 thru Fig 5 .
Turn ignition switch to ON position. Ensure test bulb flashes (or stays on) and fuel gauge needle moves.

CAUTION: Gauge coils can be damaged if wire is grounded too long. Perform test as quickly as possible.

Fig 1: Fuel Gauge Test Connection ID (Colt, Colt 200, Summit)

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Fig 2: Fuel Gauge Test Connection ID (Colt Vista)

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Fig 3: Fuel Gauge Test Connection ID (Colt Wagon)

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Fig 4: Fuel Gauge Test Connection ID (Colt Vista 4WD)

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Fig 5: Fuel Gauge Test Connection ID (Ram-50)

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