Toro Workman 3000 Series Service Manual page 185

Glow Plug Switch (Briggs/Daihatsu Diesel Engine)
The glow plug switch is located on the control panel on
vehicles powered with a diesel engine. This rocker
switch allows the glow plugs to be energized.
The switch terminals are marked as shown in Figure 20.
The circuitry of the glow plug switch is shown in the chart
below. With the use of a multimeter (ohms setting), the
switch functions may be tested to determine whether
continuity exists between the various terminals for each
position. Verify continuity between switch terminals.
Diodes (Briggs/Daihatsu Gas and Diesel Engine)
Diodes D1 and D2 are used for circuit protection from
voltage spikes that occur when a solenoid is de–ener-
gized. Diode D1 is in the optional hydraulic circuit and D2
is in the starting circuit.
These diodes plug into the vehicle wiring harness at vari-
ous locations (see appropriate vehicle electrical sche-
matic in Chapter 11 – Electrical Schematics).
Testing
The diodes can be individually tested using a digital
multimeter (diode test or ohms setting) and the table to
the right.
Workman 3000/4000 Series
SWITCH
POSITION
OFF
MOMENTARY
ON
1
1. Diode
2. Male terminal
Multimeter
Red Lead (+)
on Terminal
Female
Male
Page 8 – 15
3 2 1
6 5 4
Figure 20
NORMAL OTHER
CIRCUITS CIRCUITS
2 + 3 5 + 6
1 + 2 4 + 5
Figure 21
3. Female terminal
Multimeter
Black Lead (–) Continuity
on Terminal
Male YES
Female NO
Electrical System
2
3