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To Measure Voltage:
In the example below, the circuit voltage is being measured at the bulb positive (+)
terminal.
• Turn the circuit to be tested 'ON'.
• Set the Digital Multi Meter (DMM) to Voltage Check (V). Ensure the multi meter is
set to DC Volts for direct current circuits (most circuits) or AC Volts for alternating
current circuits (typically alternator output voltage tests).
• Set the range of the DMM to the range best suited to the voltage of the circuit
being tested (typically 20 Volts for most DMMs). Refer to the DMM manufacturers
instructions.
• Connect the black (ground) lead of the DMM to a reliable ground connection
(usually the battery or frame ground).
• Locate the positive terminal of the wire or component to be tested.
• Connect the red (positive) lead of the DMM to the positive terminal.
• Read the voltage from meter.
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