Case 580SR Service Manual page 976

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6.5 PRELIMINARY CHECK AND TESTS
To prevent damage to components of the alternator
charging circuit, the following precautions must be
taken during maintenance:
Z NEVER connect or disconnect a charging circuit
connection, including the battery, when the motor is
running.
Z NEVER dead short to ground any component of the
charging circuit.
Z ALWAYS disconnect the ground cable from the
battery (negative) to recharge the battery on the ve-
hicle using a battery charger.
Z ALWAYS respect the polarity when connecting the
battery on the vehicle or when connecting an auxil-
iary starter battery to the motor.
IMPORTANT: connect the positive cable to the pos-
itive terminal and the negative cable to the negative
terminal.
PRELIMINARY CHECKS
Before undertaking an electrical inspection, check
the charging circuit and the electrical circuit carefully.
Check the state of cables and the tightening of con-
nections.
Checking the battery
Check each cell of the battery with a hydrometer.
The battery must be charged at least 70% and be in
good condition.
Checking the drive belt
Check that the belt and the pulley of the alternator
are clean, without any trace of oil and grease and
that they are in good condition.
Checking the indicator lamp
Turn the ignition key and check that the charge indi-
cator is well lit.
If it is not fully lighted, check its bulb. If the bulb is OK,
check the alternator wire connections as described
in the "Preliminary tests" section below.
If the indicator lamp is lighted, start the motor and run
it at a speed that is higher than the idling speed. The
indicator lamp must turn off.
If the indicator lamp does not turn off, turn off the mo-
tor and disconnect the ground cable L. If the indicator
lamp goes out, an alternator component is defective.
Follow the instructions given in the "Checking the al-
ternator components" section below.
If the indicator lamp stays lighted, look for a dead
short to ground between the terminal "L" cable and
the indicator lamp.
SECTION 55 - ELECTRICAL SYSTEM
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