Service Manual

Groundsmaster 4500−D/4700−D Page 5 − 51 Electrical System
Resistor Module (Machines with Two−Post ROPS Extension Operator Fan Kit)
Figure 64
1. Operator’s fan 2. Fan mount bracket 3. Resistor module
12 3
The resistor module is attached to the rear of the fan
mounting bracket (Fig. 64). The resistor module is used
for operation of the operator’s fan.
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 resistor, remove the sunshade from
the top of the ROPS extension.
3. Disconnect the wire harness connectors from the re-
sistor module terminals.
4. Use a multimeter to check that the resistance values
of the resistor module as below (Fig. 65).
Test Point 1
Test Point 2 Expected Reading
Motor Pin Pin 1 Less than 9 ohms
Motor Pin Pin 2 Less than 6 ohms
Motor Pin Pin 3 Less than 3 ohms
5. Replace the resistor module if it fails the test.
6. If the resistor module 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 wire
harness connectors to the resistor module terminals
(Fig. 65) and install the sunshade.
1. Pin 1 (Violet wire)
2. Pin 2 (Brown wire)
3. Pin 3 (Orange wire)
4. Pin 4 (Not used)
5. Motor pin
6. Resistor module
Figure 65
1
5
6
4
3
2
1
2
3
4
MOTOR
Electrical
System