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Toro battery tester. Set the VOM to DC Volts. If more
than one scale is available, set
it
to the first larger than
14 volts.
The battery should show a voltage between
12 and 14
volts. See Figures 113 and 114.
Figure 113
Figure 114
NOTE: Keep in mind that a dead battery can occur
due to a number of different causes.
Ignition Switch Testing:
Pull the connector
off
the back of the ignition switch
and test switch operation with a volt/ohmmeter
(VOM)
or test light. The switch should be closed (very low
resistance) in the 'start' position and open (very high
resistance)
in
the 'off' position. See Figure 115.
Wire Harness Testing:
Disconnect the wire harness from the ignition switch
and the starter motor. Check wires A,
B,
and C (Figure
116) for continuity by connecting a
VOM or test light to
Vacu-Power
ower
65
either end of each wire. All should be continuous. If not,
repair or replace the wire harness.
Figure
115
OF WIRING HARNESS
Figure 116
Check for short circuits by checking
continuity
between each of the wires. None should be continuous
with the others unless attached
to the same connector.
Finally, check each wire for continuity to ground by
attaching one test lead to ground (engine block) and
the other lead to one of the wires in the wire harness.
There should be no continuity between the wires and
ground unless the wire is a ground wire.
Starter Motor Testing:
Using a Key-Lectric starting battery that
is known to be
good, touch the connector directly to the connector on
the starter motor. See Figure 11 7. The motor should
turn.
If the mower doesn't turn, it is malfunctioning. Remove
the end cap from the motor and check for stuck
brushes or loose wires. Repair any problems found.
If
Electrical Systems
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