Fuel Gauge & Wiring Harness Operational Test

1. Unplug fuel tank sending unit connector. Turn ignition switch to ON position. If fuel gauge indicates EMPTY, go to next step. If fuel gauge does not indicate EMPTY, repair short in wiring harness. See WIRING DIAGRAMS .
2. Connect a 12-volt, 3.4-watt test light between appropriate terminals of sending unit wiring harness connector. See Fig 1. See FUEL GAUGE & HARNESS TEST  table.
3. With ignition switch in ON position, test light should flash and gauge needle should move toward FULL. If test light does not flash and gauge needle does not move, check wiring harness for open. Repair or replace as necessary. If wiring harness checks good, perform FUEL GAUGE RESISTANCE TEST below.

FUEL GAUGE & HARNESS TEST

Model	Sending Unit Connector Terminals No.
Land Cruiser	4 & 5

Fig 1: Identifying Fuel Sending Unit Harness Connector Terminal

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