Electrical System Quick Checks; Battery; Charging System Test; Voltage Drop Testing - Toro Reelmaster 6500–D Service Manual

Electrical System Quick Checks

Battery Test (Open Circuit Test)
Use a multimeter to measure the voltage between the
battery terminals.
Set the multimeter to the DC Volts setting. The battery
should be at a temperature of 60_ to 100_ F. The ignition
key should be off and all accessories turned off. Connect
the positive (+) Volt meter lead to the positive battery
post and the negative (–) Voltmeter lead the the nega-
tive battery post.
NOTE: This test provides a relative condition of the bat-
tery. Load testing of the battery will provide additional
and more accurate information.

Charging System Test

This is a simple test used to determine if a Charging sys-
tem is functioning. It will tell you if the charging system
has an output, but not how much (amps) or what it is ca-
pable of.
Tool required: Digital Multimeter – DC volts setting.
Test instructions: Connect the positive (+) multimeter
test lead on the positive Battery Post, and negative (–)
lead on the negative Battery Post. Leave test leads con-
nected and start engine and run at 2000 RPM minimum.
Test results should be:

Voltage Drop Testing

This is a simple test that should be used to locate excess
resistance in an electrical circuit.
Tool required: Digital Multimeter – DC volts setting.
Test instructions: Connect the positive (+) multimeter
test lead to the power side (or most positive) of the com-
ponent, circuit or connection. Connect the negative (–)
multimeter test lead to the ground side (or least positive)
of the component, circuit or connection. Turn on the cir-
cuit to be tested and read the voltage. Remember –
when performing voltage drop tests the circuit must be
complete and activated to locate the resistance!
Reelmaster 6500–D/6700–D
Voltage Measured
12.6 V (or higher)
12.4 V
12.2 V
12.0 V
NOTE: Regulated voltage will increase to approximately
13.5 Volts when the engine is running.
At least 1 volt over Open Circuit test results.
Example: Open Circuit Test results
Charging System Test results
Difference
Voltage Drop Specifications (Maximums)
High Amperage
Circuits (u20 A.)
.4 volt feed side
.4 volt ground side
Page 5 – 33
Battery Charge
Fully charged (100%)
75% charged
50% charged
25% charged
= 12.5v
= 13.5v
= +1.0 v
Low Amperage
Circuits (t20 A.)
.2 volt feed side
.2 volt ground side
Electrical System