Electrical system
80
Key to wiring diagram
The key to the wiring diagram is essential when it
comes to identifying faults and checking the
connections if wires, connections or harness must be
repaired or replaced (Fig. 76).
Position and denomination
A - Headlight; B - Horn; C - Alternator; D - Cold weather
starter; E - Battery; F - Starter motor; G - Dry air filter
clogging sensor (if installed); H - Power lift oil filter
clogging sensor (if installed): I - Water temperature
sensor; L - Engine oil pressure sensor; M - Light switch;
N - Field light switch; O - Hazard light switch; P -
Revolving beacon switch (if installed); Q - Instrument
panel; R - Fuel level transmitter; S - Starter panel; T -
Fuse box; U - Fuse box; V - Blinkers; Z - Light and turn
indicator switch; AA - Rh rear side light; AC - Field light;
AD - Hand brake switch; AE - Brake light switch; AF -
Safety switch; AG - Trailer power socket; AH -
Synchronized PTO switch; AI - PTO engaged switch; AL
- Slow or fast PTO switch; AM - Revolving beacon (if
installed); AN - License plate light; AO - Lh front side
light; AP - Lh rear side light; AQ - Resistance; AR -
Diode 1N4007; AS - Diff lock switch (if installed); AT -
Pressure sensor for trailer brake hydraulics; CA - CB -
CC - CD - Instrument panel connectors.
Cable colours
A - Pale blue; B - White; - C - Orange; G - Yellow; H -
Grey; L - Blue; M - Brown; N - Black; R - Red; S - Pink; V
- Green; Z - Violet.
Power socket
1 - Lh turn indicator; 2 - Not used; 3 - Earth; 4 - Rh turn
indicator; - 5 - Rh rear side light; 6 - Brake light; 7 - Lh
rear side light.
Fuses for the electrical system
The tractors electrical system is protected against
short circuits and overloads by a set of fuses placed in
two fuse boxes (U and T) in the instrument panel (Fig.
75).
Before replacing a blown fuse with an equivalent one,
try to identify and remedy the cause of the fault.
Fig. 75
Fuse
CIRCUITS PROTECTED
Amp.
Fuse box T
1)
Rh side lights - Instrument
lighting
7.5
2)
Lh side lights - Side light indicator
light - Lighting inside the
dashboard
7.5
3)
Dipped beams
10
4)
Main beams and relative indicator
10
5)
Field light
10
6)
Revolving beacon (if installed)
7.5
7)
Not used
8)
Not used
Fuse box U
1)
Cold weather starter
20
2)
Hazard lights
20
3)
Power for instruments & indicators
7.5
4)
Turn indicators
10
5)
Brake lights
10
6)
Horn
7.5
7)
Not used
8)
Not used