Component Identification and Testing

For accurate resistance and/or continuity checks, elec­ trically disconnect the component being tested from the circuit (e.g. unplug the ignition switch connector before doing a continuity check).

CAUTION

When testing electrical components for continu- ity with a multimeter (ohms setting), make sure that power to the circuit has been disconnected.

Ignition Switch

The ignition (key) switch has three positions (OFF, START and RUN). The terminals are marked as shown. The circuitry of the ignition switch is shown in the chart. With the use of a continuity tester, the switch functions may be tested to determine whether all circuits are being completed while the key is moved to each position.

 

A

 

TORO

 

B

 

Y

S

 

 

I

 

X

Figure 4

CONTINUITY

OTHER

POSITION AMONG

CIRCUITS

TERMINALS

MADE

1. OFF

NONE

NONE

2. RUN

B+I+A

X+Y

3. START

B+I+S

NONE

Figure 5

Electrical

System

 

 

Groundsmaster 3000/3000–D

Page 6 – 9

Electrical System

Page 115
Image 115
Toro 3000D manual Component Identification and Testing, Ignition Switch