Pto Switch Test - Simplicity Broadmotor Series Service & Repair Manual

7 Electrical System Service
Component Tests
SWITCH TERMINALS
(BACK OF SWITCH)
A
B
D
Figure 32. PTO Switch Terminals
A. Top N.C. Terminals
B. Middle N.C. Terminals (Not Used)
C. Middle N.O. Terminals (Not Used
D. Bottom N.O. Terminals
J. PTO Switch Test
The PTO switch is used in the PTO circuit and both safety
interlock circuits: cranking and safety shutoff. To accom-
modate these circuits, the PTO switch has four contacts
actuated by the pull knob. The top and bottom contacts
are common to all models covered in this manual. The
middle N.O. (Normally Open) contacts are not used.
The N.C. contacts will be closed when the PTO switch is
in the OFF position. Pulling up on the knob closes the
contacts, pushing down on the knob will open the con-
tacts.
The N.O. contacts will be open when the PTO switch is
in the OFF position. Pulling up on the knob opens the
contacts, pushing down on the knob will close the con-
tacts these switches.
TEST PTO SWITCH
NOTE: You may want to remove the PTO switch from
the control panel for testing. Refer to the PTO Switch
Replacement procedures located in this section.
1. Pull the wire harness off the back of the switch.
2. Place the PTO switch in the OFF position, knob
pushed down (Figure 33).
3. Set VOM to Ohm. Test the top, middle, and bottom
rows of terminals for continuity (Figure 33).
4. Place the PTO switch in the ON position, knob pulled
up (Figure 34).
5. Set VOM to Ohm. Test the top, middle, and bottom
rows of terminals for continuity (Figure 34).
Replace a switch that does not pass all tests.
PTO SWITCH CIRCUITS
C
N.C .
N.O. / N.C.
N.O.
PTO Switch – OFF Position
Continuity
Figure 33. Test PTO Switch – OFF Position
PTO Switch – ON Position
No Continuity
No Continuity
Figure 34. Test PTO Switch – ON Position
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Continuity
No Continuity
No Continuity
Continuity
Continuity