Electrical System Quick Checks; Battery Test (Open Circuit Test); Charging System Test; Voltage Drop Testing - Toro Reelmaster 6500-D Service Manual

Electrical System Quick Checks

Battery Test (Open Circuit Test)

This is a simple test used to determine the condition of
the battery at rest.
Tool required: Digital Multimeter - DC volts setting.
Test instructions: Set the multimeter to the DC Volts set-
ting. The battery should be at a temperature of 60_ to
100_ F. The ignition key should be off and all accesso-
ries turned off. Connect the positive (+) Volt meter lead
to the positive battery post and the negative (-) Voltme-
ter lead the the negative battery post.
Note: This test provides a relative condition of the
battery. 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 com-
plete 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
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 (>20 A.)
.4 volt feed side
.4 volt ground side
Page 5 - 17
Battery Charge
Fully charged (100%)
75% charged
50% charged
25% charged
voltage will increase
= 12.5v
= 13.5v
= +1.0 v
Low Amperage
Circuits (<20 A.)
.2 volt feed side
.2 volt ground side
Electrical System (Rev. C)
to