Discovery electrical Manual — part 4
INTRODUCTION
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[0]
X134
Ignition
Switch
[0] 0, off
[1] I, radio
[2] II, ignition
[3] III, start
[1]
[2]
[3] [0]
[1]
[2]
[3] [0]
[1]
[2]
[3]
R
15
50
30
5
3
4
2
Terminal number
Component designation
R" receives battery voltage
in positions I, II
Terminal
number
Designation
50
Battery voltage: Ignition
Switch in position III
30
Battery voltage: supplied
constantly
15
Battery voltage: Ignition
Switch in position II or III
R
Battery voltage: Ignition
Switch in positions I, II
31
Terminal
number
Designation
X
Switched battery voltage
through the ignition load reĆ
lay or accessory relay; igniĆ
tion switch is in position I or
II.
49
Flasher unit input
49aFla
sher unit output
56aHigh bea
m
56b
Low beam
85
End of relay coil
86
Start of relay coil
87
Relay contact
87a
Relay contact
Ground
50
Start
56
Headlamp
56d
Headlamp flash
58
Side lamps
INTRODUCTION
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All components are identified by a letter
followed by an arbitrary number assigned to
the component. The letter assigned to the
component indicates the type of component.
B
Bulbs, Heated Screens,
Mirror Demisters, Cigar
Lighters, and Heated
Washer Jets
Definition of Vehicle Component Codes
K
Relays, Solenoids,
Speakers, and Resistors
M
Motors
P
Fuse Boxes and Fusible
Links
X
Switches and Sensors
Z
Electronic Control Units,
Modules, Shields, Diodes,
and Capacitors
B Ć Black
G Ć Green
K Ć Pink
L Ć Light
N Ć Brown
O Ć Orange
P Ć Purple
R Ć Red
S Ć Grey
U Ć Blue
W Ć White
Y Ć Yellow
All wires are identified by letters which indicate
a certain colour. Wire colour and size will only
be shown once if it does not change throughĆ
out the circuit. The following chart explains the
wire colour abbreviations.
Wire Colours
B Ć Black
G Ć Green
K Ć Pink
L Ć Light
N Ć Brown
O Ć Orange
P Ć Purple
R Ć Red
S Ć Grey
U Ć Blue
W Ć White
Y Ć Yellow
Wire Colour Chart
A schematic page which follows another
schematic page of the same chapter will have
an arrow in the upper left hand corner. There
is no arrow on the first schematic page of a
chapter. Schematic pages which are followed
by another schematic page will have an arrow
in the lower right hand corner. If the page is
the last page of the chapter, there will be a
square instead of an arrow.
Previous and Next Arrows
Page Qualifiers
Schematic pages which are specific to certain
model, option or country variations will have a
small Qualifier" after the Previous Arrow in the
upper left-hand corner. For example, a section
might contain pages specific to petrol engines
and some pages specific to diesel engines.
Petrol" will be shown in the upper left hand
corner of petrol specific pages, and Diesel"
will be shown in the upper left hand corner of
diesel specific pages.
INTRODUCTION
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Certain abbreviations are used throughout the
Electrical Troubleshooting Manual as circuit
qualifiers. The following list explains all
abbreviations used as qualifiers in the Circuit
Diagrams.
ABS
AntiĆLock Braking System
Circuit Qualifiers
LHD
Lefthand Drive
RHD
Righthand Drive
LWB
Long Wheel Base
SWB
Short Wheel Base
NAS
North American Countries
MFI-V8
Multiport Fuel Injection
(MFI-V8)
Certain abbreviations are used throughout the
Electrical Troubleshooting Manual as Switch
Position notes. The following list explains all
abbreviations used as Switch Position notes in
the Circuit Diagrams.
Switch Positions
< 100
Less than 100
> 100
More than 100
A/C
Air Conditioning
MFI-T16
Multiport Fuel Injection
(MFI-T16)
300 Tdi
Tdi Diesel
300 Tdi with
EGR
Tdi Diesel with Exhaust Gas
Recirculation (EGR)
300 Tdi without
EGR
Tdi Diesel without Exhaust
Gas Recirculation (EGR)
300 Tdi with
EDC
Tdi Diesel with Electronic
Diesel Control (EDC)
300 Tdi without
EDC
Tdi Diesel without ElectronĆ
ic Diesel Control (EDC) (apĆ
plies to Tdi Diesels with
and without EGR)
SFI-V8
Sequential Multiport Fuel
Injection (SFI-V8)
BBUS
Battery Backed Up Alarm
Sounder (Z272)
INTRODUCTION
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100
400
300
200
500
700
600
800
ÉÉÉ
ÉÉÉ
ÉÉÉ
ÉÉÉ
ÉÉÉ
200
100
300
400
Connector, Ground, and Splice Identification by Location
Connectors, Grounds, and Splices are identified by a letter followed by a number.
Connectors are identified by C, grounds by E, and splices by S. Some splices are
contained in junction connectors. These splices are identified by the prefix HJ" below
the splice's reference number. The number assigned to the connector, ground, or splice
corresponds to its location in the vehicle.
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