Diode Assembly - Toro ProLine H800 Service Manual

Diode Assembly

Testing the Diode Assembly
ProLine H800
19241SL Rev A
g295056
1. End of the diode body
2. Diode assembly
The diode assembly is used in the main wire harness. The diode can be
identified by their black color and diode symbol on the end of the diode body.
The diode assembly is used to protect the PTO clutch from reverse polarity
in the electrical circuit.
The diode assembly is used to protect the engine shut off solenoid from voltage
spikes in the electrical circuit.
1. Park the machine on a level surface, lower the cutting deck, shut off the
engine, set the parking brake, and remove the key from the key switch.
2. Locate and get access to the diode assembly near PTO electric clutch near
the engine and remove cable tie that secures diode to wire harness. Unplug
the diode from the wire harness for testing.
3. The diode can be tested using a digital multimeter (diode test or ohms
setting); refer to Diode Test Table (page
Diode Test Table
Multimeter Red Lead (+)
on Terminal
Female
Male
4. If testing determines that diode is faulty, replace diode assembly.
5. After diode testing is complete, make sure that diode is fully installed into wire
harness connector and secured to harness with cable tie.
Figure 137
3. Male terminal
4. Female terminal
6–43).
Multimeter Black Lead
(-) on Terminal
Male
Female
Page 6–43 Electrical System: Testing the Electrical Components
Continuity
Yes
No