Testing The Electrical Components; Fusible Links - Toro Greensmaster 3120 Service Manual

Testing the Electrical Components

Fusible Links

Testing a Fusible Link
Greensmaster 3120
17230SL Rev C
For accurate resistance and/or continuity checks, electrically disconnect the
component being tested from the circuit (e.g., unplug the key switch connector
before doing a continuity check of the switch).
Note: For the engine component testing information; refer to the Briggs &
Stratton Engine Repair Manual.
When testing the electrical components for continuity with a
multimeter (ohms setting), ensure that you disconnect the power to
the circuit.
g224250
The electrical system includes two (2) fusible links for protecting the machine
circuits. One of these fusible links is included in the main wire harness and is
connected to the same terminal of the starter solenoid as the battery positive
cable (main harness terminal J3). The second fusible link is included in the
engine wire harness and connects to the engine at the output lead of the
regulator/rectifier (engine harness terminal P19). If either of these links should
fail, current to the protected circuits will be interrupted. Refer to the electrical
schematics and wire harness drawings
location and additional circuit information.
1. Make sure that key switch is in the O
2. Disconnect the negative (-) cable from the battery and then disconnect the
positive (+) cable from the battery.
3. Locate the fusible link in the wire harness and use a multimeter to make sure
that continuity exists across the fusible link. If continuity does not exist across
the fusible link (open circuit), replace the fusible link.
4. After testing is complete, make sure that all the wire harness connectors are
secured. Connect the positive (+) cable to the battery first and then connect
the negative (-) cable to the battery. Coat the wire and cable connections
at the battery and at the starter solenoid with
(page 5–3).
IMPORTANT
Figure 83
inAppendix A (page A–1)
position.
FF
Page 5–11 Electrical System: Testing the Electrical Components
for fusible link
Battery Terminal Protector