WORKSHOP MANUAL
MPV 320W / 520W
Chapter
7 - ELECTRICAL SYSTEM
EDITION
2017
PAGE
56 /
64
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.
* The normally closed switch contacts are marked with “NC”; normally open contacts do not have
a mark.
50
87
86
30
85
87A
87
86
30
85
87A
1
2
1
2
30
15/54
50
30
15/54
50
30
15/54
BK
1
2
1
2
21
22
13
14
21
22
13
14
PTO Switch
Operator presence switch
Starter relay
Relay
Switches: Parking brake / Left bonnet /
Upper casing *
Brake alarm stop Switch
Key switch
Disengaged
Engaged
(down position)
(up position)
Operator
Operator
off seat
on seat
Not energized
Energized
Off
Run
Start
Not energized
Energized
Button up
Button down
Button up
Button down
