Using electrical test equipment
Z-GI-13spec tableElectrical test equipment — use, operation, handling precautions
Test lamp
UseTest for locating open or shorted circuits.
OperationConnect the test lamp between the circuit being measured and a ground. The lamp will light if the circuit is energized to the point tested.
Handling precautionsTest lamps use 12V 1.4 or 3.4W bulbs or light-emitting diodes (LED). Using a large capacity bulb may damage the CPU.
Jumper wire
UseUsed to create a temporary circuit.
OperationConnect the jumper wire between the terminals of a circuit to bypass a switch, etc.
Handling precautionsDo not connect the power side directly to a ground as this may burn the harness or damage electrical components.
Voltmeter
UseUsed for measuring the voltage of a circuit to locate possible opens or shorts.
OperationConnect the positive (+) lead to where voltage is to be measured and the negative (–) lead to a ground.
Handling precautionsConnect the voltmeter in parallel with the circuit. Set the range to the desired voltage. Use the service hole when measuring the voltage at the diagnosis connector. Tie a thin wire to the positive (+) lead to access narrow terminals.
Ohmmeter
UseUsed for locating opens and shorts in the circuit, confirming continuity of switches and checking sensor resistance.
OperationZero the ohmmeter. Verify that current is not flowing through the circuit. Touch the leads to the check points.
Handling precautionsZero the meter after switching to the measuring range. Before using the ohmmeter, make sure that the ignition switch is OFF or the negative (–) battery cable is disconnected to prevent burning the ohmmeter.
Ammeter
UseUsed for checking alternator output, current supplied to the starter, and dark current within a circuit. Note: Dark current is the current flowing through the circuit when the ignition switch is OFF.
OperationConnect the ammeter in series with the circuit by touching the positive (+) lead to the power side terminal and the negative (–) lead to the ground-side terminal.
Handling precautionsSet the range to the desired voltage. Connect the ammeter in series with the circuit. The ammeter may be burned if it is connected in parallel.