Yamaha 115B, Service Manual

Page: 226 / 261

ELEC
8-1 61U5H11
Electrical system
Checking the electrical
component
Measuring the peak voltage
To check the electrical components or mea-
sure the peak voltage, use the special service
tools. A faulty electrical components can be
easily checked by measuring the peak volt-
age. The specified engine speed when mea-
suring the peak voltage is effected by many
factors such as fouled spark plugs or a weak
battery. If one of these factors is present, the
peak voltage cannot be measured properly.
w
When checking the peak voltage, do not
touch any of the connections of the digital
circuit tester leads.
c C
When measuring the voltage of an electri-
cal component with the digital circuit
tester, make sure that the tester leads do
not contact each other. Otherwise, the
electrical component could be damaged.
NOTE:
9
Before measuring the peak voltage, check
all wiring for proper connection and corro-
sion, and check that the battery is fully
charged.
9
Use the peak voltage adapter with the rec-
ommended digital circuit tester.
9
Connect the positive pin of the peak voltage
adapter to the positive terminal of the digital
tester, and the negative pin to the negative
terminal.
9
When measuring the peak voltage, set the
selector on the digital circuit tester to the
DC voltage mode.
6B480015
Digital circuit tester: 90890-03174
Peak voltage adaptor B:
90890-03172
61U5H11_08 05.10.7 3:02 PM Page 2