Service Manual

Groundsmaster 4500−D/4700−DPage 5 − 50Electrical System
Fan Speed Switch (Machines with Two−Post ROPS Extension Operator Fan Kit)
The fan speed switch is attached to the overhead control
panel (Fig. 62). The switch is used to select the fan
speed (off, low, medium, or high).
Testing
1. Park the machine on a level surface, lower the cut-
ting decks, and shut off the engine. Remove the key
from the key switch.
2. To access the switch, remove the sunshade from the
top of the ROPS extension.
3. Disconnect the machine wire harness from the fan
speed switch.
4. The switch terminals are identified in (Fig. 63). With
the use of a multimeter (ohms setting), test the switch
functions to determine if continuity exists between only
the terminals listed for each switch position. Check the
continuity between the switch terminals.
Switch Position
Closed Circuits
OFF L+H
LOW B+C+L
MEDIUM B+C+M
HIGH B+C+H
5. Replace the fan
speed switch if testing determines
that the switch is damaged.
6. If the fan speed switch testing is correct and a circuit
problem still exists, check the wire harness; refer to
Electrical Schematics and Wire Harness Drawings in
chapter 9-Foldout Drawings.
7. After you complete the testing, connect the machine
wire harness to the switch and install the sunshade.
1. Fan speed switch
2. Control knob
3. Control panel
Figure 62
1
2
3
Figure 63
L
M
H
C
B
BACK OF SWITCH