Checking The Electrical Component; Measuring The Peak Voltage - Yamaha F30A Service Manual

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ELEC
Checking the electrical
component

Measuring the peak voltage

To check the electrical components or mea-
sure the peak voltage, use the special ser-
vice tools. A faulty electrical component can
be easily checked by measuring the peak
voltage. The specified engine speed when
measuring the peak voltage is affected by
many factors, such as fouled spark plugs or a
weak battery. If one of these factors is
present, the peak voltage cannot be mea-
sured properly.
DC V
WARNING
When checking the peak voltage, do not
touch any of the connections of the digital
tester leads.
CAUTION:
When testing the voltage between the ter-
minals of an electrical component with
the digital tester, do not allow any of the
leads to touch any metal parts. If touched,
the electrical component can short and be
damaged.
8-7
Electrical system
S6AL8010
NOTE:
• Before measuring the peak voltage, check
all wiring for corrosion and proper connec-
tion, and check that the battery is fully
charged.
• Use peak voltage adapter B with the rec-
ommended digital circuit tester.
• Connect the positive pin of peak voltage
adapter B to the positive terminal of the dig-
ital tester, and the negative pin to the nega-
tive terminal.
• When measuring the peak voltage, set the
selector on the digital circuit tester to the
DC voltage mode.
Digital circuit tester: 90890-03174
Peak voltage adapter B:
90890-03172
67C3K11