Diode Assemblies - Toro Field Pro 6040 Service Manual

Diode Assemblies

Testing the Diode Assembly
Electrical System: Testing the Electrical Components
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1. Diode assembly
2. Wireless hour meter relay
A diode plugs into the optional wireless hour meter wire harness. The diode and
wireless hour meter relay are tied to the main wire harness behind the battery.
The diode works in conjunction with the wireless hour meter relay to separate the
2 different power supplies used to power the wireless hour meter. The diode can
be identified by its black color and diode symbol on the end of the diode body.
The maximum current allowed through the diodes is 6 amps.
An additional diode is used in the optional laser level kit. The coil of solenoid
valve SV on the laser control manifold includes an internal non-replaceable diode.
Refer to Hydraulic Solenoid Valve Coils (page 6–24)
1. Park the machine on a level surface and set the key switch to the O
position.
2. Remove the hood.
3. Locate and remove the diode from the wire harness. Check the diode and
the diode holder for damage or corrosion and clean or repair if necessary.
4. Use a multimeter to check for voltage drop across the diode terminals (diode
test setting). Contact the multimeter red (+) lead to diode terminal A and the
black (−) lead to diode terminal B. A reading of less than 0.7 volts should be
displayed on the multimeter.
OR
Use the table provided and a multimeter (ohms setting) to measure the
resistance across the diode terminals.
Figure 75
3. Battery
Page 6–22
for additional information.
FF
Field Pro® 6040
22267SL Rev A