Xj s Schematics

J aguar XJ -S Schemat chematic ic Draw ings http:/ / www.skjagtech.co.uk 

1975 -1991 Pre faceli facelift ft models

Documen t dated 15-May-2006 15-May-2006 Copyright (c) S&K Jagtech (skjagtech.co.uk) 2005

Co n t e n t s H ead, Side lights

3

Fog light

3

H eadlamp wash wipe

4

Cruise Control

4

Wash wipe

5

Radio

6

Merlin and H irschmann

6

Boot lights

6

Flasher indicators

7

Window lift

7

Interior Lights

8

Bulb failure

8

Door Lock/ Unlock Lucas

9

Door Lock/ Unlock Kiekerk

9

Small item s

10

Trip Computer

11

Intruments

11

Electrically operated door mirrors

12

H eated backlight

12

H eated Drivers Seat and Lumbar control

13

Quad headlamps

13

Boot Lock/ Unlock

14

TWR/ JaguarSport Ariel Arrest

14

Jaguar XJ-S Window Lift with 4 relay upgrade and N egitive rest

15

Jaguar XJ-S Wiper under relay control

16

DISCLAIMER  Should you decide to undertake w ork on any system covered in these documents, SK Jagtech accept no liability for damage to the vehicle or personal injuries how ever caused. The information in this document is provided to help explain and provided reference material. We are geared up with the right equipm ent and have trained knowledgeable staff who can perform maintenance and fault finding on your Jaguar and it is recommend that you leave any technical work  to a suitable specialist firms if you are in any w ay unsure of a procedure. You are alw ays welcome to contact us for advice.

Jagu ar XJ-S H ead, Side and Fog light Schem atic

N

Terminal post

U

Headlamp inhibit relay

Main Switch

N

U/ R R/ U

R/ O

Latched Dip

Fog lamp warning lamp

Fuse 1 Fog lamp switch

Main

Fuse 5

R/ H Front Fog lamps

R/ Y

U

Main relay

Headlamp flash

R/ H Dip Beam

L/ H

Fuse 3 L/ H

R/ H R/ U Rear Fog Lamps

Main beam warning lamp

Fuse 4 R/ H

L/ H

U/ W Main Beam Fuse 2 L/ H

Fibre Optic Lamp

Generic Diagram

Cigar lighter

Panel Lamps Alternative to computer harness if fitted Switch and Clock Lamps

Gearbox selector Fuse 7

Rheostat

Side marker NAS

Fuse 15

F parking R/ H

Bulb failure unit front

Side marker NAS

Different models are cabled differently and therefore this diagram is a generic curcuit that should help trace a fault. As data becomes available we will add additional diagrams to cover the differences in switch gear extra

Fuse 14

F parking L/ H

Rear lamp in-line fuse

Bulb failure unit left rear

Rear lamp in-line fuse

Bulb failure unit right rear

Rear tail

To Caravan Socket

L/ H No plate Rear tail R/ H

To Caravan Socket Warning lamp blocking diodes

To Stop lamp failure unit

No plate Bulb Failure lamp

3

Jagu ar XJ-S H eadlam p wash wipe and Cruise Cont rol Schem atic

Wash Wipe Relay U LG

Windscreen Washer Pump

LGU

Wiper Motor Right

Washer switch

Diode Pack  Pektron Blue 1 3

LG

2 4 5 Headlight washer pump UR To headlight Dip beam BW To headlight main beam

Wiper Motor Left

Bellows and actuator solenoid valves

BG

YO YW Brake Operated switch

Speed Contr ol Interface ECU

Y

YO

BR

GP

YW

YW

YB

YB

NW

BS

LGY

To fuse 4 via control module in Boot/ trunk  harness

N G N

B

NB

YP

NY

BK

B

4

Control Switch

Set Switch

Fuse 17

G

Transducer

Inhibit Switch

BW Kickdown Solenoid

B

LGW Kickdown Switch

G

To fuse 5

Jaguar XJ-S wash wipe and heated backlight Schematic

A

A

Intermittent/  flick wipe

7-3-1 & 5-6

B

Fast Wipe

1-4 & 27

C

Slow Wipe

1-5 & 2-7

D

Off

1-7 and 5-6

Switch Schema tic explained This is a Jaguar idea here (don’t blame us) The black lines A, B, C and D are used to show which contacts 1-7 are conected in which ever mode is in use. For example Slow= 1-5 and 2-7 Fast= 1-4 and 2-7 Below are two other variations 1 designed by us which are provided to get the point across

B

C

D 2

7

3

1

4

5

6

BLG WLG RLG ULG

OLG

Wiper Motor

   t    i   n    U   y   a    l   e    D

Park 

Fuse 9

LG

Fast

Off/ Park  Off/ Park 

Slow

Run

U/ LG

W/ LG

U/ LG

W/ LG

R/LG

B/ LG

R/ LG

B/LG

LG

K/ LG

LG

K/ LG

B

LG/ B

B

LG/ B

Slow

Fast

Intermitant

U/ LG

W/ LG

U/ LG

W/ LG

R/LG

B/ LG

R/ LG

B/LG

LG

K/ LG

LG

K/ LG

B

LG/ B

B

LG/ B

Intermitant

5

Jaguar XJ-S Radio, Merlin and H irschm ann Aerial Schem atic

Merlin Style E lectric Aerial WK

In Line Fuse Radio - CD/ Tape WK

Clock where fitted

UW 3

Aerial

4 Delay relay unit

1 5

2

UR

NP

BS

Boot Lights

O m it in g Ma s t D e l a y    1    5    /    0    3

86

86 87a

87a

   1    5    /    0    3

87

85

87

85

Fig 1

For those who don’t want the 10 sec delay for the mast to retract or who have a faulty delay module: Substitute with a change over relay (Part no REL7DB available from us) and wire it in as per the relay schematic shown in fig 1. Note that the pin configuration is different on a standard ISO relay than on the Lucas delay module, fig 2.

Fig 2 Lucas with ISO numbering

Hirschmann Style Electric Aeriel WK

In Line Fuse Radio - CD/ Tape WK

Clock where fitted

W/ O 3

Aerial

5 1

P 4

2

Delay relay unit

NP

BS

Boot Lights

O m it in g Ma s t D e l a y    1    5    /    0    3

86

86 87a

Fig 1

6

   1    5    /    0    3

87

85

85 No connection

87a

87 Fig 2 Lucas with ISO numbering

For those who don’t want the 10 sec delay for the mast to retract or who have a faulty delay module: Substitute with a change over relay (Part no REL7DB available from us) and wire it in as per the relay schematic shown in fig 1. Note that the pin configuration is different on a standard ISO relay than on the Lucas delay module, fig 2.

Jagu ar XJ-S Flash er indicat ors and window lift Schemat ic

Acoustic unit

LGP

LGU

Fuse 2

NO

Flasher Unit

To terminal post

LGU

Hazard Switch G

   N    W    O    N    K    N    U

To fuse 5 Blocking diode

GN GW

LGN

LH Warning Lamp Blocking diode

LGB RH Warning lamp

Flasher Switch Hazard warning lamp

LH repeater

RH repeater

LH Rear indicator

RH Rear indicator B B

LH Front indicator

RH Front indicator

Caravan Socket

Caravan Socket

LH Window motor

RH Window motor

RG

GR

RU

LH Window lift switch 1 3

7

GU RH Window lift switch

2

1 3

6 8

2

6 8

7 B

B NU

Window Lift relay WK

To Ignition

B

NU

NU

Up Pins 1&3 Pins 2&6 + 1 3

7 7

Rest Pins 1&3 + Pins 2&6 + 2

6 8

1 3

7

Thermal Switch N

To Terminal post

Down Pins 1&3 + Pins 2&6 2

6 8

1 3

7

2

6 8

and yes for some bizare reason known only to the engineers at Lucas the motor is live on both sides at rest. Switch motion

Jaguar XJ-S Interior Lights and Bulb failure Schematic

PG PWS Map Light Switch

Interior Light Switch

P PK

P

PK

Fuse 13

Drivers Lamp Passenger Lamp

Roof Light and Switch

To Terminal Post

PWS

Rear Passenger lamp

Delay unit Puddle Lamp

LH Door Switch

PW

Rear Passenger lamp

Blocking Diode

Puddle Lamp PW

WY

RH Door Switch

NO TE : This diagram is full of factory drawing errors (awaiting correction by S&K Jagtech)

B BY

Brake Warning Lamp

Warning Lamp Failure Unit

BY Reservoir brake switch Oxygen Warning Lamp

PDWA BS

Handbrake Warning Lamp

BW RH Stop Lamp

BW

W

Handbrake Switch BY

LH Stop Lamp

Stop Lamp failure Warning Unit B

LGP

BS WY

8

GP

To Foot Brake Switch B To Bulb Failure unit via diode

To Stop Lamp bulb failure unit

To Ignition Switch

Jagu ar XJ-S Door Lock/ Unlock Lucas an d Kiekerk Schematic

NR

N

P

N

OW

B

B

OR

FOR BOOT LOCK MOD see Upgrad es Schemat ics B B

OU

OG Actuators (LUCAS SYSTEM) LOCK L/ H

UNLOCK

OR

OG

L/ H B

R/ H

R/ H

Grounded through Solinoid body

To terminal 12v supply

To terminal 12v supply O/ B

N

N

O/ R

B O/ R O/ B

Thermal breaker

P

W

Control Module

L/ H Door Motor O/ W

O/ G

R/ H Door Motor O/ W

O/ W

9

O/ G

Boot / Trunk Motor

O/ G

Jagu ar XJ-S Small item Schem atic

Vacuum Delay Schematic

Coolant warning Schematic W WU

Warning Light Control Unit

B WR

G

Fuse 4

WU

Delay Unit

To Ignition switch

B

Overcharge Schematic

Low Coolant Warning Lamp

WR

Warning Light Control Unit

Coolant Temp Sensor

PW

2

3

4

BS B

B

NS

5

To Positive Supply

B To Ignition Switch

2 3 4 5

3 way soleno id valve 2 way soleno id valve Solenoid air valve Coolant temp Switch

Seat Belt Warning Schematic B

B

Logic Unit

B

Aircon Cooling Fan Schematic

B

GN Diode pack 

Coolant Fan BG

In Line Fuse BG

NR

To fuse 2

PG To Door Switch

W To ignition sw

LG K

GO Horn Sw

GN A  C   C  l    u  t    c  h 

N Hor n Relay

To Fuse 11

PY

LG

 s   w T  h  i   e   t    c  r  h  m  o

LG

GN PY

Horn Schematic

Horn

H orn

B

10

To Aircon

To Fuse 11

To Fuse 1

Jagu ar XJ-S Trip Comp uter Schematic and Int rum ents

Trip Computer

10:30

Connector

Interface Unit

Connector

O

B

YG

P

B

RU

G

G

Terminal Post

To fuse 4

YG

G Transducer

YB - Y

To Sidelamps

Y

To ECU pin 26

To Speedometer

G

To fuse 4 Temperature

Oil pressure

B

Fuel

Battery

Tachometer

GU

Coolant temperature sender

WN

Oil pressure transmitter

LGO

WS

Low fuel warning Fuel tank  sender

WS

w

To ignition switch

To Amplifier

11

Jagua r XJ-S Electrically operated door m irrors and heated backlight

PUS PKS

RH Vertical Motor

RH mirror switch

RH Ho rizontal Motor

PNS

To Fuse 8

PGS PUS PKS LH Vertical Motor

LH mirror switch

LH Ho rizontal Motor

PNS

To Fuse 8

PGS

Contr ol Switch

Fuse 12

To Ignition switch protection Relay

Delay Unit

LH Door Mirror

Backlight

Warning Lamp

12

RH Door Mirror

Jagu ar XJ-S H eated D rivers Seat an d Lum bar control & Qu ad h eadlamps

Heater E lement Heater Timer

Left Hand To Ignition Switch Lumber Motor

Seat relay (5 pin)

Fuse 19 Fuse 13

Fuse 20 Lumber Motor Fuse 14 To Battery +12v Terminal post

Heater Timer

Right Hand Heater E lement

Main Switch Latched Dip

U/ R

U

Main

Fuse 3 20a Main relay R/ H

Fuse 2 35a Dip Beam

U/ W Headlamp flash

Fuse 4 35a L/ H Fuse 5 20a

13

Jaguar XJ-S Boot Lock/ Unlock an d Jagua rSport TWR Ariel Arrest Thermail breaker

+ 12v Terminal Post

NR

N OW

B

P

N

B

OR

B B

OU

Grounded through solinoid body OG Actuators (LUCAS SYSTEM) UNLOCK LOCK L/ H

OG

OR

L/ H B

R/ H

R/ H

Boot lock Motor Upgrade 30/ 51

+12v from terminal post

Aditional wiring shown within dotted line

30/ 51

86 85

WK

86 87

87a

87a

87

The mot orized actuator is held at ground on both sides while the relays lay at rest. Once energised by ether the lock or unlock triggers (O/ R or O/ G) that corresponding relay switches one side to Positive and the motor moves to lock or unlock depending on the systems request.

85

In Line Fuse Radio - CD/ Tape WK

Clock where fitted

3

Hirschmann Style 5

OW

Aerial

P 1 4

2

Delay relay unit

NP

87a 30/ 51

87

NP 85 Boot Lights

Aerial Arrester Relay

86

BS

Unlike the JaguarSport Arrester relay this one is wired after the delay relay so that once the boot is opened far enough to activate the boot lights the aerial immediately starts to descend even if the timer is still counting down. This way you preserve the delay stopping the mast popping up and down as you move the key from Acc to Ignition.

14

Jaguar XJ-S Window Lift with 4 relay upg rade and N egitive rest

LH Window motor

LH Window motor

R/ G

R/ U

G/ R

30/ 51

30/ 51

86 85

30/ 51

86 87

87a

85

30/ 51

86 87

G/ U

87a

85

86 87

87a

85

87

87a

N R/ G R/ U

1 3

GR

2

6 8

7

1 3

7

LH Window lift switch

B

2 G/ U

6 8

RH Window motor

B NU

Ther mal Switch N

To Terminal post

Window Lift relay To Ignition

WK

B

NU

NU

and yes for some bizare reason known only to the engineers at Lucas the motor is live on both sides at rest. Switch motion

Up Pins 1&3 Pins 2&6 + 1 3

7

15

Rest Pins 1&3 + Pins 2&6 + 2

6 8

1 3

7

Down Pins 1&3 + Pins 2&6 2

6 8

1 3

7

2

6 8

In line 2amp fuse

N

To Terminal post

Alterna tive rela y ope ra tion circuit

This s che ma tic involves swa pping the P os itive a nd Nega tive termina ls on the ba ck of the s witch. This re su lts in the re lays an d motors lying a t nega tive when no action is reque sted from the s witch and should be given rea sona ble consideration a s the correct method. Plea se ins ure tha t a co py of this circuit is ins erted into your cars literature and that you attach a labe l to the switch harnes s so that the ne xt owner or garage know that this car is non s tandard. As to why Ja gua r de cide d to wire this for constan t pos itive! Its a ny ones guess , one s hort and its game over.

Jagu ar XJ-S Wiper u nder relay control

A

Intermittent/  flick wipe

7-3-1 & 5-6

B

Fast Wipe

1-4 & 27

C

Slow Wipe

1-5 & 2-7

D

Off

1-7 and 5-6

30/ 51

30/ 51

86

A

85

86 87

85

87

87a Term Post

B

In line 35Afuse

30/ 51 C

86 85

D 2

7

3

1

4

5

87

87a

6

BLG WLG

RLG ULG

OLG

Wiper Motor

   t    i   n    U   y   a    l   e    D

30/ 51 86 Park  85

87

LG

This circuit was designed by Kirby Palm and is an adaptation from the one in his on-line book (see our links page). Kirby rightly points out that this system provides a Solid Positive and Negative feed and is by far the best solution which is why we substituted our original relay schematic for his superior one. This is however no t a direct copy, as we have re-configured the relays as an all in solution whereas his can be inst alled as 1, 2 or 3 relays but we felt it is far better to go all the way. This is not a cure for wiper switch problems please see the article in the support section of our web site at http:/ / skjagtech.co.uk/ html/ support.htm for details.

16

Run

87a

Fuse 9