Introduction - Cub Cadet RZT-S Professional Shop Manual

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Introduction

This chapter is divided into five sections:
• Introduction: About this chapter and precautions
• Components: This section will describe the location and operation of the electrical components on the
mower. Where appropriate, some disassembly or component removal instructions will be included.
• Circuits
• Diagnostic Techniques: This section will cover basic tools, techniques, and methodology for diagnosing
electrical issues on the mower. A lot of the information in this section can be applied to other equipment.
• Schematics
Before disconnecting any electrical component, take precautions to prevent the component or
! CAUTION ! CAUTION
the wires attached to it from shorting out. The most effective means of doing this is to discon-
nect the battery ground cable from the negative battery terminal. Unless performing tests that
require the electrical system to be in operation, disconnect the negative cable from the battery before
doing any work to the electrical system of the mower.
IMPORTANT: Do not return an unsafe mower to service.
Components
Figure 6.1
CHAPTER 6: ELECTRICAL SYSTEM
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Key switch
The Key Switch is the same key switch that is on all
Cub Cadet RZT mowers. See Figure 6.1.
1. In the OFF position, continuity can be found between
the M, G, and L terminals. See Figure 6.1.
• M is connected to the magneto by a yellow wire, G
is connected to ground by a green wire, and L is
connected to the after fire solenoid.
NOTE: In the OFF position, the magneto primary windings
are grounded, disabling the ignition system. The
after fire solenoid loses its power from the B termi-
nal. This turns off the fuel supply.
• Symptom: engine runs with key in OFF position:
The key switch is not completing the path to
ground either because of an internal fault or a bad
ground connection elsewhere in the harness.
Check continuity between M, G, and L terminals
with key switch in OFF position. Check the green
wire for continuity to ground.
Electrical System
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