Service Manual

Testing
This section will define components, and the tests that
can be performed on those components, when those
parts are disconnected from the electrical system.
For accurate resistance and/or continuity checks, elec-
tr
ically disconnect the component being tested from the
circuit (e.g. unplug the seat switch connector before
doing a continuity check).
NOTE: Electrical troubleshooting of any 12 Volt power
con
nection can also be performed through voltage drop
tests without disconnection of the component.
When testing electrical components for con-
tinuity with a volt-ohm meter or continuity
tester, make sure that power to the circuit has
been disconnected.
CAUTION
Ignition Key Switch
The ignition (key) switch has three positions (OFF, RUN
and START). The terminals are marked as shown.
A
The circuitry of the ignition switch is shown in the chart.
Y
With the use of a continuity tester, the switch functions
B
may be tested to determine whether all circuits are being
completed while the key is moved to each position.
S
I
X
Figure 4
POSITION
CONT
INUITY
OTHER
AM
ONG
CIRCUITS
TE
RMINALS
MADE
1. OFF
NONE
NONE
2. RUN
B + I + A
X + Y
3. START
B + I + S
NONE
Figure 5
Testing P
age 5 - 16 Groundsmaster
®
455-D