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WORKSHOP MANUAL
MPV 320W / 520W
b) Normally closed switch (NC)
To test a normally closed switch connect the ohmmeter between the switch
terminals.
• The meter should indicate a closed circuit (zero resistance «0»).
• Activate the switch. The Ohmmeter should indicate an open circuit (zero
resistance «°°»).
This indicates the switch is operating properly. Variation from test results de-
scribed indicates a defective switch.
The diagrams show the connections of the electrical components in different situations.
NOTE - The continuous line indicates the electrical continuity of the circuit. All switches are
shown from the rear.
Key switch
PTO Switch
Disengaged
(down position)
Operator presence switch
1
2
Operator
off seat
Starter relay
Not energized
* The normally closed switch contacts are marked with "NC"; normally open contacts do not have
a mark.
7 - ELECTRICAL SYSTEM
30
30
50
15/54
15/54
Off
BK
Engaged
(up position)
1
2
Operator
on seat
Energized
Chapter
30
50
15/54
Run
Start
Relay
87
87A
86
30
Not energized
Switches: Parking brake / Left bonnet /
Upper casing *
1
2
Button up
Brake alarm stop Switch
21
22
13
14
Button up
EDITION
2017
56 /
50
87
87A
85
86
85
30
Energized
1
2
Button down
21
22
13
14
Button down
PAGE
64
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