1.1 Located a fuel injector
1.2 Back probe the wire to the fuel injector by inserting a pin down the rubber insulation far enough to connect with metal wire terminal on the inside.
1.3 Make sure meter leads are clear of moving parts, and start the engine.
1.4 Record the voltage to the fuel injector: 14.19volts
Discuss Why would we bother checking the voltage supply to the fuel injectors?
Should be supply voltage to ensure injectors works correctly, if we do not have supply voltage we should have faulty with the injector or injector circuit.
5.1 If we find lower voltage at the injectors than at battery, what can that mean? And how would injector operation be affected?
Lower voltage means there is a resistor which causing voltage drop, and less power of engine.
1.6 Draw a full circuit diagram for the fuel injectors, including battery, ignition, switch, main relay and how the injectors are switched:
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