
Electrical System Quick Checks
Testing the Battery (Open Circuit Test)
Use a multimeter to measure the voltage between the battery terminals; refer to
Battery Test Table (page 5–6)
.
Set the multimeter to the DC volts settings. The battery must be at a temperature
of 16°C to 38°C (60°F to 100°F). Ensure that the key is in the O
FF
position and
all the accessories are turned off.
Connect the positive (+) multimeter lead to the positive battery post and negative
(-) multimeter lead to the negative battery post.
Measure and record the battery voltage. Use the
Battery Test Table (page 5–6)
to determine charge level of the battery.
Note:
This test provides a relative condition of the battery. The load testing of
the battery provides additional and more accurate information; refer to
the Battery (page 5–37)
.
Battery Test Table
Voltage Measured
Battery Charge Level
12.68 V (or higher)
Fully charged (100%)
12.45 V
75% charged
12.24 V
50% charged
12.06 V
25% charged
11.89 V
0% charged
Testing the Charging System
This is a simple test that determines if a charging system is functioning. It tells
you if the charging system has an output, but not its capacity.
1. Use a digital multimeter to set DC volts and connect the positive (+)
multimeter lead to the positive battery post and negative (-) multimeter lead
to the negative battery post. Record the battery voltage.
2. Keep the multimeter leads connected to the battery posts and start the
engine. The battery voltage while the engine is cranking, then must increase
once the engine is running.
Note:
Depending upon the condition of the battery charge and battery
temperature, the battery voltage increases at different rates as the battery
charges.
3. Start the engine and run it at high-idle speed (3,550 to 3,650 rpm). Allow the
battery to charge for a minimum time of 3 minutes and record the battery
voltage. After running the engine for a minimum time of 3 minutes, the battery
voltage must be minimum 0.50 V higher than that of the initial battery voltage.
Refer to the
Battery Voltage Table (page 5–7)
for an example of a properly
functioning charging system.
Electrical System: Electrical System Quick Checks
Page 5–6
Pro Force® Debris Blower
18237SL Rev A
Содержание Pro Force 44552
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