Toro 30857 - Engine Cooling Fan Switch

Groundsmaster 4500--D/4700--D Page 5 -- 21 Electrical System
Engine Cooling Fan Switch
The engine cooling fan switch is located on the outside
of the console arm (Fig. 25). This two position rocker
switchallowstheenginecoolingfantoruninthenormal,
automatic mode or in the manual reverse (momentary)
direction.
Testing
1. Before disconnecting the engine cooling fan switch
for testing, the switch and its circuit wiring should be
tested as a TEC input with the Diagnostic Display (see
DiagnosticDisplayintheTroubleshootingsectionofthis
chapter). If the Diagnostic Display verifies that cooling
fanswitchandcircuitwiringarefunctioningcorrectly,no
further switch testing is necessary. If, however, the Dis-
playdeterminesthatcoolingfanswitchandcircuitwiring
are not functioning correctly, proceed with test.
2. Make sure ignition switch is OFF. Remove key from
ignition switch.
3. Disassemble console arm to gain access to the en-
gine cooling fan switch (see Console Arm Disassembly
intheService andRepairssectionofChapter 7 -- Chas-
sis).
4. Disconnect harness electrical connector from the
cooling fan switch.
5. With the use of a multimeter (ohms setting), the
switch functions may be tested to determine whether
continuityexists between thevariousterminalsforeach
position. The switch terminals are marked as shown in
Figure 26. The circuitry of the cooling fan switch is
shown in the chart below. Verify continuity between
switch terminals.
SWITCH
POSITION
NORMAL
CIRCUITS
OTHER
CIRCUITS
AUTO 2+3 5+6
MANUAL RE-
VERSE
2+1 5+4
6. If switch tests correctly and circuit problem still ex-
ists,checkwireharness(seeElectricalSchematicsand
Wire Harness Drawings in Chapter 9 -- Foldout Draw-
ings).
7. After testing is completed, connect wire harness
connector to the cooling fan switch.
8. Assembleconsolearm(seeConsoleArmAssembly
intheService andRepairssectionofChapter 7 -- Chas-
sis).
1. Console arm 2. Cooling fan switch
Figure 25
1
2
Figure 26
BACK OF SWITCH
NOTE: Fan switch terminals 3, 4, 5 and 6 are not used
on Groundsmaster 4500--D and 4700 --D machines.
Electrical
System