Skylark V6-3100 3.1L VIN M SFI (1996)
Fuel Gauge: Symptom Related Diagnostic Procedures
Gauge Reads Empty When Tank Is Full
This condition is generally caused by a short in the fuel tank unit circuit.
1. Disconnect electrical connector to sending unit, then turn ignition switch to ON position.
2. If gauge reads past full, test gauge with tester tool No. BT-6508, or equivalent. If gauge reads empty, disconnect main body harness connector,
near the fuse block.
3. If gauge still shows empty, check for short in printed circuit or defective gauge. If gauge reads beyond full, reconnect front body harness connector
and disconnect rear body harness connector (in left wheel house).
4. If gauge shows empty, locate and repair grounded wire in harness between front and rear body harness connectors. If gauge reads beyond full,
check for short between rear body harness connector, damaged float or defective sending unit.
