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PRECAUTIONS FOR MAINTENANCE OPERATION
A
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+
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+
B
C
D
00-14
Inspection procedures for blown fuses
Remove fuse B and measure resistance between the loaded side of
the fuse and ground.
Turn on all circuit switches (connected to the fuse). If the resistance
value reading is approximately 0 Ω, a short has occurred between the
Ω
0
switch and the loaded point. A value of other than zero may indicate
that the fuse was blown by a temporary short but the short is no longer
present.
The major causes of a short circuit are as follows:
• Harness stuck onto the vehicle body.
• Harness sheath damaged by friction or heat.
• Water in connectors or circuits.
E
• Mistakes (accidental short circuits)
A : Battery
B : Fuse
C : Loaded switch
D : Load
E : Short circuit
02596
Precautions for handling alternator
When servicing the alternator, pay attention to the following :
• Do not connect the alternator with battery polarities reversed.
If the alternator is connected with reversed polarities, a large cur-
rent flow from the battery to the alternator occurs, and the diode or
regulator might be damaged.
04746
• While the engine is running, do not remove the battery terminals. If
the battery terminals are removed at that time, a surge voltage is
generated and the diode or regulator might be weakened.
04747
• Do not use a high-voltage tester such as a megger for inspection.
If a high-voltage tester is used, the diode or regulator might be
destroyed.
02371
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