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ELECTRICAL ANALYSIS
Peak voltage adapter
NOTE:
• Throughout this chapter the peak voltage
adapter's part number has been omitted.
Refer to the following part number.
• The peak voltage adapter should be used
with the digital tester.
Peak volt meter adapter:
YU-39991
Peak voltage adapter B:
90890-03172
• When measuring the peak voltage, connect
the peak voltage adapter to the digital circuit
tester and switch the selector to the DC volt-
age mode.
NOTE:
• Make sure that the adapter leads are prop-
erly installed in the digital circuit tester.
• Make sure that the positive pin (the "+" mark
facing up as shown) on the adaptor is
installed into the positive terminal of the
tester.
• The test harness is needed for the following
tests.
È Voltage measurement
É Peak voltage measurement
Test harness
Checking steps:
• Disconnect the coupler connections.
• Connect the test harness between the
couplers.
• Connect the tester terminals to the termi-
nals which are being checked.
• Run the engine and observe the mea-
surement.
NOTE:
If the lighting coil and pickup coil(s) are mea-
sured unloaded, disconnect the test harness
on the output side coupler.
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