Diode Assemblies - Toro Workman GTX Service Manual

Diode Assemblies

Two (2) identical diode assemblies are included in the
Workman GTX wire harness.
The diode D1 is used for circuit protection from voltage
spikes that can occur when the start/run solenoid is de−
energized. This diode plugs into the wire harness be-
neath the seat base near the battery.
The second diode is used for circuit logic to allow the key
switch START position to function. This diode plugs into
the wire harness near the relays mounted under the
hood.
The diode assembly can be identified by a black color
and a diode symbol on the end of the diode assembly
body (Fig. 25). Refer to the wire harness drawings in
Chapter 7 − Electrical Drawings for additional informa-
tion on diode assembly location.
NOTE: If a vehicle is equipped with the optional brake
and turn signal kit that includes flashers, four (4) addi-
tional diodes are used for hazard light and turn signal cir-
cuit logic. These diodes plug into the brake and turn
signal kit wire harness and can be accessed by raising
the hood.
Testing
1. Park vehicle on a level surface, stop engine, engage
parking brake and remove key from the key switch.
2. Locate diode assembly that is to be tested.
3. Remove cable tie that secures diode to wire harness.
Unplug the diode from the wire harness for testing.
4. Test diode assembly using a digital multimeter
(diode test or ohms setting) and the table in the right col-
umn.
5. If testing determines that a diode assembly is faulty,
replace diode assembly.
6. After diode testing is complete, make sure that diode
assembly is fully installed into wire harness connector
and secured to harness with cable tie.
Electrical System
4
1. Diode assembly
2. Male terminal
Multimeter
Red Lead (+)
on Terminal
Female
Male
Page 5 − 20
1
Figure 25
3. Female terminal
4. End of diode body
Multimeter
Black Lead (−) Continuity
on Terminal
Male YES
Female
Workman GTX Gasoline
2
3
NO