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© Mitsubishi Forklift Trucks 2013. All
© Mitsubishi Forklift Trucks 2013. All
rights
rights reserved.
reserved.
Revision: B
Revision: B
PBV20N2
PBV20N2
8.7
8.7
Horn
Horn
Figure 71. Horn
Figure 71. Horn
Type
Type
V V
s s
Electrical wiring
Electrical wiring
Spare part
Spare part
If the horn does not work properly, disconnect it and then measure with a
If the horn does
not work properly, disconnect it and then measure with a multimeter
that the horn is
that the horn is not broken. Set the multimeter to the
not broken. Set the multimeter to the ohms range, and connect it
between the H1/ A1 and H1/A2 terminals. The value should be ~4 Ω.
between the H1/ A1 and H1/A2 terminals. The value should be ~4
Normally the horn creates voltage peaks that may cause problems to other
Normally the horn creates voltage peaks that may cause problems to other electrical
devices. To prevent these voltage peaks, a diode (V8 in the circuit diagram) is installed
devices. To prevent these voltage peaks, a diode (V8 in
parallel to the horn terminals.
parallel to the horn terminals.
8.7.1
8.7.1
Diode
Diode test
test with
with a a multimeter
The basic diode test is
The basic diode test is very simple to perform; only two
very simple to perform; only two multimeter tests are needed to
ensure that the diode works correctly:
ensure that the diode works correctly:
1. 1. Remove
Remove the
the horn.
horn.
2. 2. Set the
Set the multimeter to
multimeter to the
3. 3. Connect th
Connect the diode's
e diode's cathode
cathode terminal to
anode to the multimeter's negative or common terminal.
anode to the multimeter's negative or common terminal.
4. 4. Set
Set the m
the multimeter
ultimeter to re
to read
https://www.forkliftpdfmanuals.com/
A low or 0 re
A low or 0 reading shou
ading should be obtain
Document ID: 615023
Document ID: 615023
AMA S.P.A horn
AMA S.P.A horn
24 Vdc
24 Vdc
Quick connect terminals 6.3 x 0.8 mm
Quick connect terminals 6.3 x 0.8 mm
RL604758
RL604758
multimeter
the ohms or
ohms or diode
diode range.
range.
terminal to the multime
the multimeter's positive
ad ohms
ohms or d
or diode.
iode.
ld be obtained.
ed.
122 (244)
122 (244)
Service Manual
Service
Manual
multimeter
ohms range, and connect it
Ω.
electrical
the circuit diagram) is installed
multimeter tests are needed to
ter's positive terminal an
terminal and the
d the
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