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Warning light circuit check- Ignitionswitch Live supplyfrom battery Ignitionwarninglight Check where thelive connectionruns into thewarning lightbulbholder. Wiringloom Voltageregulator Probe the wiringwhere it runs fromthe generator orregulator into thewiring loom. Generator Test the connectionwhere the wire runsfrom the bulbholderto the generator orvoltage regulator.

If the warning light is not working and the bulb hasn't blown you can check the wiring circuit with a test lamp. Turn on the ignition, connect one side of the tester to earth and probe the various parts of the circuit shown here. In all cases the test lamp should light.

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