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Power supply
Fuse
Switch
I
I
Motor
GENERAL
GENERAL ELECTRICAL SYSTEM CHECKS
A circuit consists of the power supply, switch, relay, load
ground, etc. There are various methods to check a circui;
including an overall check, voltage check, short circuit check
and continuity check. Each of these methods is briefly de-
scribed in the following.
VOLTAGE CHECK
(1) Ground one lead wire of the test light. If a voltmeter
is used instead of the test light, ground the grounding
side lead wire.
(2) Connect the other lead wire of the test light to the
power side terminal of the switch connector. The test
light should come on or the voltmeter should indicate
a voltage.
(3) Then, connect the test light or voltmeter to the motor
connector. The test light should not come on, or the
voltmeter should indicate no voltage. When the switch
is turned on in this state, the test light should come
on, or the voltmeter should indicate a voltage, with
motor starting to run.
(4) The circuit illustrated here is normal but if there is
any problem such as the motor failing to run, check
voltages beginning at the connector nearest to the
motor until the faulty part is identified.
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