Xj s Schematics

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J

aguar XJ

-

S

chemat

ic Draw

ings

http:/ / www.skjagtech.co.uk

1975 -1991

Pre

faceli

ft models

Copyright (c) S&K Jagtech (skjagtech.co.uk) 2005

Documen

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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.

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Main

Switch

Headlamp inhibit relay

Main relay

Headlamp flash

Fog lamp switch

Fuse 1

Fuse 5

Fuse 3

Fuse 4

Fuse 2

Dip Beam

R/ H

L/ H

R/ H

L/ H

Main Beam

Front Fog lamps

Rear Fog Lamps

R/ H

L/ H

R/ H

L/ H

R/ U

R/ Y

R/ O

N

R/ U

U/ R

U

U/ W

Main beam

warning

lamp

Fog lamp

warning

lamp

Terminal post

N

U

To Stop lamp

failure unit

To Caravan Socket

R/ H L/ H No plate Rear tail No plate Rear tail F parking L/ H F parking R/ H Switch and Clock Lamps Panel Lamps

Fibre Optic Lamp Cigar lighter Gearbox selector

Bulb Failure lamp

Warning lamp blocking diodes Rheostat Fuse 7

Bulb failure unit front

Bulb failure unit left rear

Bulb failure unit right rear Rear lamp in-line fuse

Rear lamp in-line fuse Fuse 15 Fuse 14 Side marker NAS Side marker NAS Alternative to computer harness if fitted Latched Dip Main

Generic Diagram

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

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Y BR YW YB NW N G N NB NY BK YP B BS YB YW GP YO YO BG LGY G BW B B LGW G YW Wiper Motor Right

Wiper Motor Left

Transducer Speed Contr ol

Interface ECU

Bellows and actuator solenoid valves Wash Wipe Relay

LG U LG BW To headlight main beam UR To headlight Dip beam Diode Pack Pektron Blue Windscreen Washer Pump Headlight washer pump LGU Washer switch

Brake Operated switch

Control Switch

Fuse 17

Set Switch

Inhibit Switch

Kickdown Solenoid

Kickdown Switch _{To fuse 5} To fuse 4 via control module in Boot/ trunk harness 1 2 3 4 5

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A B C D 1 2 7 3 4 5 6 Wiper Motor Park Run LG OLG ULG RLG WLG BLG 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

Off/ Park Slow Fast Intermitant W/ LG B/ LG K/ LG LG/ B B U/ LG R/LG LG W/ LG B/ LG K/ LG LG/ B B U/ LG R/LG LG W/ LG B/LG K/ LG LG/ B B U/ LG R/ LG LG W/ LG B/LG K/ LG LG/ B B U/ LG R/ LG LG Off/ Park Slow Fast Intermitant Fuse 9 D e l a y U n i t

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

Radio - CD/ Tape

Aerial Delay relay unit

Boot Lights BS

NP Clock where fitted

In Line Fuse WK WK UW UR 3 5 1 2 4

Merlin Style E lectric Aerial

Radio - CD/ Tape

Aerial

Delay relay unit

Boot Lights BS

In Line Fuse WK WK W/ O P 3 ₅ 1 2 4

Hirschmann Style Electric Aeriel

3 0 / 5 1 87 86 85 87a

O m it in g Ma s t D e l a y

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 3 0 / 5 1 87 86 87a Fig 1 3 0 / 5 1 87 86 85 87a

O m it in g Ma s t D e l a y

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 3 0 / 5 1 87 86 87a Fig 1 No connection 85 85

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

Hazard Switch Flasher Unit Flasher Switch Blocking diode LH Warning Lamp Blocking diode RH Warning lamp RH repeater RH Front indicator RH Rear indicator LH repeater LH Front indicator LH Rear indicator Hazard warning lamp

Fuse 2

To terminal post

To fuse 5 Acoustic unit

Caravan Socket Caravan Socket

B B GW GN LGB LGU LGP NO LGU G LGN

LH Window lift switch LH Window motor

RH Window lift switch RH Window motor RG GR RU GU B B B NU NU NU _N WK To Terminal post To Ignition

Window Lift relay

Thermal Switch U N K N O W N 1 2 3 6 7 8 1 2 3 6 7 8 Up Rest Down 1 2 3 6 7 8 1 2 3 6 7 8 1 2 3 6 7 8 Pins 1&3 -Pins 2&6 + Pins 1&3 + Pins 2&6 + Pins 1&3 + Pins 2&6

-S w i t c h m o t i o n _{and yes for some bizare reason}

known only to the engineers at Lucas the motor is live on both sides at rest.

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Jaguar XJ-S Interior Lights and Bulb failure Schematic

Map Light Switch Interior Light Switch

Roof Light and Switch

Fuse 13 To Terminal Post Delay unit LH Door Switch RH Door Switch Blocking Diode Puddle Lamp Rear Passenger lamp Puddle Lamp Rear Passenger lamp Drivers Lamp Passenger Lamp PG PWS P PK PW PW P PK PWS Warning Lamp Failure Unit

Reservoir brake switch PDWA Brake Warning Lamp Oxygen Warning Lamp Handbrake Warning Lamp Handbrake Switch

Stop Lamp failure Warning Unit RH Stop Lamp

To Ignition Switch LH Stop Lamp

To Bulb Failure unit via diode To Foot Brake Switch

To Stop Lamp bulb failure unit BS WY B WY B GP LGP BY B W BW BW BY BY BS

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

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

LOCK UNLOCK

L/ H

R/ H

FOR BOOT LOCK MOD

see Upgrad es Schemat ics

L/ H

R/ H Actuators (LUCAS SYSTEM)

OR OG OG OR OW NR N N P B B B B B OU O/ B O/ R O/ W O/ G B N P N O/ R O/ B O/ W O/ G O/ W O/ G Control Module

Toterminal12vsupply Toterminal12vsupply

Thermal breaker

L/ H Door Motor

R/ H Door Motor

Boot / Trunk Motor

W

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Jagu ar XJ-S Small item Schem atic

Fuse 4 Warning

Light Control

Unit Low Coolant

Warning Lamp Coolant Temp Sensor To Ignition switch G WU B WR B WU W WR

Coolant warning Schematic

Vacuum Delay

Schematic

Overcharge

Schematic

To Aircon To Fuse 11 To Fuse 1 Delay Unit

2 4 3

5

2 3 way soleno id valve 3 2 way soleno id valve 4 Solenoid air valve 5 Coolant temp Switch

To Positive Supply Warning Light Control Unit To Ignition Switch PW NS BS B B B B B B Logic Unit

Seat Belt Warning Schematic

B To fuse 2 NR PG To Door Switch W To ignition sw GO K Horn Sw To Fuse 11 Hor n Relay H o r n H o r n LG P Y B N P Y Coolant Fan In Line Fuse Diode pack GN GN LG BG BG LG GN

Aircon Cooling Fan Schematic

Horn Schematic

A C C l u t c _h T h e _r m o s w i t c _h

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Transducer

10:30

Terminal Post To Sidelamps To fuse 4 To ECU pin 26 To Speedometer Connector Trip Computer YG O B G YB - Y Y B P RU G YG G

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

Interface Unit Connector G B GU WN LGO WS To fuse 4

Temperature Oil pressure Fuel Battery

Tachometer

To Amplifier To ignition switch

Low fuel warning Fuel tank sender Oil pressure transmitter Coolant temperature sender w WS

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

PNS PKS PUS PGS PNS PKS PUS PGS To Fuse 8 To Fuse 8

RH mirror switch RH Vertical Motor RH Ho rizontal Motor

LH mirror switch LH Vertical Motor LH Ho rizontal Motor

LHDoorMirror Backlight RHDoorMirror

Warning Lamp

Contr ol Switch

Delay Unit

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

Fuse 14 Fuse 13 Fuse 20 Fuse 19 To Ignition Switch

To Battery +12v Terminal post Seat relay (5 pin)

Heater Timer Heater Timer Lumber Motor Lumber Motor Heater E lement Heater E lement

Left Hand

Right Hand

Main relay

Headlamp flash

Fuse 5 20a

Fuse 3 20a

Fuse 4 35a

Fuse 2 35a

Dip Beam

R/ H

L/ H

U

U/ W

Latched Dip Main

Main

Switch

U/ R

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LOCK UNLOCK L/ H

R/ H

L/ H

R/ H Actuators (LUCAS SYSTEM)

OR OG OG OR OW NR N P N B B B B B OU +12v from terminal post

Boot lock Motor Upgrade

Aditional wiring shown within dotted line 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.

Radio - CD/ Tape

Aerial

Delay relay unit

Boot Lights BS

In Line Fuse WK WK OW P 3 ₅ 1 2 4

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

Hirschmann Style

85 86 87 87a 30/ 51 85 86 87 87a 30/ 51 85 86 87 87a 30/ 51 NP

Aerial Arrester Relay

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.

Grounded through solinoid body

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LH Window lift switch LH Window motor RH Window motor R/ G GR B B NU NU NU N WK To Terminal post To Ignition

Window Lift relay

Ther mal Switch 85 86 87 87a 30/ 51 85 86 87 87a 30/ 51 1 2 3 6 7 8 LH Window motor B 85 86 87 87a 30/ 51 1 2 3 6 7 8 N To Terminal post

In line 2amp fuse G/ R R/ G R/ U G/ U G/ U N R/ U 85 86 87 87a 30/ 51 Up Rest Down Pins 1&3 -Pins 2&6 + Pins 1&3 + Pins 2&6 + Pins 1&3 + Pins 2&6

-S w i t c h m o t i o n _{and yes for some bizare reason}

known only to the engineers at Lucas the motor is live on both sides at rest.

1 2 3 6 7 8 1 2 3 6 7 8 1 2 3 6 7 8

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.

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A B C D 1 2 7 3 4 5 6 Park D e l a y U n i t LG OLG ULG RLG WLG BLG 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 85 86 87 87a 30/ 51 In line 35Afuse Fuse 9 85 86 87 87a 30/ 51 85 86 87 30/ 51 85 86 87 87a 30/ 51 Wiper Motor Run Term Post

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.