(Red is unknown)
Service
|
12V
|
Colour
|
Relay
|
Fuse
|
Demisters
|
Ignition
|
Yes – Relay 1
|
3
|
|
Fog Lights
|
Direct
|
Blue/Yellow
|
Yes – Relay 2
|
4
|
Horn
|
Direct
|
Purple/Black
|
Yes – Relay 3
|
1
|
Headlights (Main)
|
Direct
|
Blue/Red
|
Apparently none
|
1
|
Headlights (Dipped)
|
Direct
|
Blue/White
|
Apparently none |
1
|
Cooling Fan
|
Direct
|
???
|
Yes - Relay at Front
|
11 |
ECU
|
Ignition
|
Green/Pink
|
Yes - Not found
|
?
|
Lamda Sensor
|
Ignition
|
Green
|
Yes - Relay 4
|
?
|
Fuel Pump
|
Ignition
|
White
|
Yes - Relay 5
|
?
|
Indicators
|
Ignition
|
Green/White
|
Yes – Flasher Relay
|
?
|
Hazards
|
Direct
|
Green/White
|
Yes – Flasher Relay
|
?
|
Sidelights
|
Direct
|
Red
|
No
|
4
|
Number Plate Light
|
Direct
|
Red
|
No
|
4
|
Reversing Lights
|
Direct
|
???
|
No
|
10
|
Brake Lights
|
Ignition
|
Green/Purple
|
No
|
4
|
Cluster Illumination
|
Ignition
|
Red
|
No
|
4
|
Instruments
|
Ignition
|
Green
|
No
|
2
|
Warning Lights
|
Ignition
|
Green
|
No
|
2
|
Wipers
|
Ignition
|
Blue/Yellow
|
No
|
?
|
Washers
|
Ignition
|
Green/Black
|
No
|
?
|
Just for completeness I figured out the Instrument Panel
wiring: (Blue means Not used, Red means don’t know)
Pin
|
Colour
|
Usage
|
White Plug
|
||
12
|
Red
|
+12V for Panel illumination
|
11
|
Blue/White
|
Headlight Full Beam Warning
|
10
|
Black
|
Earth for Headlamp Warning and Panel Illumination
|
9
|
Not Used
|
(ABS warning light)
|
8
|
Black/Yellow
|
Handbrake/Brake
Fluid Level Warning Light
|
7
|
White/Green
|
‘S’ Connector on Temperature Gauge (Sender)
|
6
|
White
|
‘S’ Connector on Fuel Gauge (Sender)
|
5
|
Black
|
‘E’ (Earth) (Earth) for Fuel and Temperature Gauge
|
4
|
Not Used
|
(Diesel GlowPlug)
|
3
|
Not Used
|
(Washer Fluid Level)
|
2
|
Not Used
|
(Low Fuel)
|
1
|
Green
|
12V for lamps and ‘B+’ on Fuel & Temperature
|
Blue
Plug
|
||
1
|
Black
|
Earth for Indicator Lights
|
2
|
????*
|
Indicator Lights
|
3
|
Not Used
|
(Windows ??)
|
4
|
Not Used
|
(?????)
|
5
|
Not Used
|
(Seat Belt)
|
6
|
?????*
|
From Negative Side of Coil
(not connected on board ?)**
|
7
|
Brown/Yellow
|
Alternator Warning Light
|
8
|
?????*
|
‘E’ on Tachometer (from +ve side of coil)
|
9
|
?????*
|
‘S’ on Tachometer
|
10
|
White/Brown
|
Oil Pressure Warning
|
11
|
Not Used
|
(Rear Screen Heater)
|
12
|
Green
|
‘B’ on Tacho (12V ignition switched)
|
* I will be able to
complete the colour column when I remove the centre dashboard.
** The
wiring diagram says to connect to coil but on PCB on back of cluster it doesn’t
appear to be connected to anything.
LAMDA
SENSOR
Not something I have seen before so needed to figure out
the wiring. Seems it is:
Sensor
|
Engine
Plug
|
Function
|
White*
|
Black
(Earth)
|
Heater
|
White*
|
Brown/Blue (Power)
|
Heater
|
Grey
|
Green
|
Signal
|
Black
|
Grey
|
Earth
|
The 2 White wires are interchangeable
ECU
The Electronic Control Unit is a ‘black box’, but I did
find a breakdown of the connections:
Pin
|
Colour
|
Function or Termination
|
Comments
|
1
|
White/Yellow
|
Coil -ve
|
Not Used
|
2
|
Pink/Blue
|
Stepper Motor Phase 2
|
|
3
|
Orange/Grey
|
Stepper Motor Phase 1
|
|
4
|
White/Pink
|
Feed from main ECU relay
|
-ve side of Switching Circuit
|
5
|
Not Used
|
Air Con Control
|
|
6
|
Not Used
|
Cooling Fan Relay
|
|
7
|
Grey
|
Lambda sensor +
|
Revised wiring extension
|
8
|
Yellow/Green
|
Throttle Sensor Supply
|
|
9
|
Yellow/Purple
|
Throttle Sensor Input
|
|
10
|
Pink
|
Diagnostics Output
|
|
11
|
Green/Pink
|
Ignition Sensing
|
|
12
|
Not Used
|
Electronic Tacho Output
|
|
13
|
Black/White
|
Immobiliser Control
|
Disabled
|
14
|
Not Used
|
??
|
|
15
|
Not Used
|
Air Con Control
|
|
16
|
Green/Black
|
Air Temp Sensor Input
|
|
17
|
Yellow
|
Engine Knock Sensor
|
|
18
|
Light Green
|
Lambda sensor -
|
|
19
|
Not Used
|
Air Con Control
|
|
20
|
Black/Purple
|
Fuel Cut off Relay Control.
|
-ve side of Switching Circuit
|
21
|
Yellow/Orange
|
Boost Purge Valve
|
|
22
|
Orange/Green
|
Stepper Motor Phase 3
|
|
23
|
Yellow/Green
|
Injector 1-4
|
|
24
|
Yellow/Blue
|
Injector 2-3
|
|
25
|
White/Black
|
Coil +
|
Actually to Coil -ve
|
26
|
Not Used
|
Cruise Control
|
|
27
|
Orange/Blue
|
Stepper Motor Phase 4
|
|
28
|
Brown/Pink
|
+12V Power
|
+ve Power circuit from Relay
|
29
|
Black
|
ECU Earth
|
|
30
|
Pink/Black
|
Engine Sensors Earth
|
|
31
|
Blue
|
Crankshaft Sensor +
|
|
32
|
White
|
Crankshaft Sensor -
|
|
33
|
Pink/Green
|
Coolant Sensor Input
|
|
34
|
Grey/Pink
|
Fuel Rail Sensor Input
|
|
35
|
Not Used
|
Air Con Control
|
|
36
|
Black/Green
|
Lambda Sensor
|
-ve side of Switching Circuit
|
LIGHTING
CIRCUIT
Pin 30 on both relays get a permanent +12 V Power Supply
from Fuse 1
Pin 87 on the relays goes to Main Beam (Blue/White) and
Dipped Beam (Blue/Red)
Light Switch gets Direct Power from Fuse 1.
Position 1 sends power to
sidelights through (Red/Grey)
Position 2 sends power to High/Dip
Switch which feeds Pin 85 of appropriate relay
Pins 86 get fed an ignition switched earth feed (Apparently not, seems to be permanent earth?)
Status: Lots to do, I still have the following outstanding questions
1. Where is the relay for the Lamda Sensor Heater ?
2. What are Fuses 5-9 for ?
3. Where are the fuses for the indicators and wipers/washers ?
3. Where are the fuses for the indicators and wipers/washers ?
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