Land Rover Defender Electrical Library Elld970e Rover Manual

							DESCRIPTIONANDOPERATION
DEFENDER 97MY 4.21
FullBeam
When thecolumn switchismoved tothe main beam position (C036-5), current
is supplied tofuse 13(C580-25) andfuse 14(C580-27) ofthe passenger
compartment fusebox.Both areconnected byblue/white wires.Afeed isalso
supplied tothe main beam warning lamp(C233-5) onablue/white wire.
Fuse 13(C580-26) suppliesafeed tothe RH headlamp (C011-1)ona
blue/orange wire.Theheadlamp isearthed (C011-3) onablack wire.
Similarily, fuse14(C580-28) suppliesafeed tothe LHheadlamp (C009-1)ona
blue/slate wire.Theheadlamp isearthed (C009-3) onablack wire.
Headlamp Flash
Fusiblelink2(C907-2) ofthe engine compartment fuseboxsupplies aconstant
battery feedtofuse 2(C580-3) ofthe passenger compartment fusebox.Fuse 2
(C580-4) isconnected tothe column switch(C036-7) byapurple wire.
When thecolumn switchispulled backtothe flash position, currentflows
across theswitch (C036-5) andprovides afeed tofuse 13(C580-25), fuse14
(C580-27) andtheinstrument packwarning lamp(C233-5) onblue/white wires.
All 3are earthed onblack wiresasdescribed inthe Full Beam description. 
						

							DESCRIPTIONANDOPERATION
4.22 DEFENDER97MY
EXTERIOR
LAMPS-Rear FogLamps
DESCRIPTION The rear foglamps onlyoperate whentheheadlamps areilluminated andthe
ignition switchisin position II.The non- latching switchispositioned inthe
centre ofthe dash panel. Whentherear foglamps areswitched on,the
instrument packwarning lampalsoilluminates. Thefoglamps areautomatically
switched offevery timetheignition isturned off.
OPERATIONFeed fromthepositive batteryterminal isconnected tothe engine compartment
fuse box(C632-1) byabrown wire.Current flowsthrough fusiblelink1and
fusible link2ofthe engine compartment fusebox,which areconnected in
parallel. Fusible link1ofthe engine compartment fusebox(C907-1) isconnected tothe
lighting switch(C041-1) byabrown wire.Withthelighting switchineither the
side ormain lampposition, currentflowsacross theswitch (C041-4) tothe
headlamp relay(C282-87) onablue wire. Asthe relay isnot energized, the
relay switch isopen, preventing currentflow.
Fusible link2ofthe engine compartment fusebox(C907-2) isconnected tothe
ignition switch(C026-1) byabrown wire.Withtheignition switchinposition II
(C094-1), currentflowstothe headlamp relaycoil(C282-85) onawhite wire.
The relay coilisearthed (C282-86) onablack wire.
With therelay coilenergized, therelay switch closes, allowing currenttoflow
from theheadlamp relay(C282-30) tofuse 6ofthe passenger compartment
fuse box(C580-11). Fuse6ofthe passenger compartment fusebox(C580-12)
is connected tothe rear fogguard lampECU(C543-2) byablue/purple wire.
The rear fogguard lampECU(C543-4) isconnected tothe rear fogguard lamp
switch (C064-2) byared/slate wire.When theswitch isdepressed
momentarily, itprovides anearth (C064-3) onablack wire.Thefogguard lamp
ECUis alsoearthed (C543-1) directlyonablack wire.When theECU senses
the second earthviathe switch, itprovides afeed (C543-3) tothe instrument
pack warning lamp(C233-4), theRH rear fogguard lamp(C512-1), andtheLH
rear fogguard lamp(C515-1). Allthree areconnected inparallel byred/yellow
wires, andearthed onblack wires. 
						

							DESCRIPTIONANDOPERATION
DEFENDER 97MY 4.23
INDICATORS
/HAZARD WARNING LAMPS
DESCRIPTION The indicators arecontrolled fromthesteering columnswitchandoperate
when theignition switchisin position II.
The hazard lampswitch islocated towards theright hand sideofthe dash
panel. Hazard operation isnot dependent onthe position ofthe ignition switch.
When thehazard switchisdepressed, bothleftand right hand indicator lights
flash. OPERATION Feed fromthepositive batteryterminal isconnected tothe engine compartment
fuse box(C632-1) byabrown wire.Power flowsthrough fusiblelink2(C907-2)
and feeds boththeignition switch(C028-1) andfuse 1(C580-1) ofthe
passenger compartment fuseboxonbrown wires.Theignition switchandthe
fuse 1ofthe passenger compartment fuseboxareconnected inparallel. Fuse
1 (C580-2) isconnected tothe hazard warning lampswitch (C096-7) bya
purple wire.
Indicators
Withtheignition switchinposition II,power flowsacross theignition switch
(C094-1) tofuse 3ofthe passenger compartment fusebox(C580-5) byawhite
wire. Fuse 3ofthe passenger compartment fusebox(C580-6) isconnected to
the hazard warning switch(C096-8) byagreen wire.Withthehazard warning
switch inthe offposition, powerflowsthrough theswitch (C096-5) andupto
the flasher unit(C547-85) onalight green wire.Theflasher unitisearthed
(C547- 86)onablack wire.Withtheflasher unitenergized, afeed (C547-87) is
sent tothe column switch(C036-3) onagreen/brown wire. 
						

							DESCRIPTIONANDOPERATION
4.24 DEFENDER97MY
Left Turn
Moving thecolumn switchtothe leftturn position allowspowertoflow through
the switch (C036-4) tothe LHrear direction indicatorlamp(C403-2), theLH
front direction indicatorlamp(C001-2), andtheLHside repeater lamp
(C013-1). These3lamps areconnected inparallel andareallfed bygreen/red
wires. Power isalso supplied tothe instrument packwarning lamp(C230-10)
on agreen/red wire.Alllamps areearthed onblack wires. Withthecircuit
complete, theflasher unitcommences openingandclosing thecircuit, causing
the LHindicator lampstoflash.
Right Turn
Moving thecolumn switchtothe right turnposition allowspowertoflow through
the switch (C036-2) tothe RH rear direction indicatorlamp(C402-2), theRH
front direction indicatorlamp(C002-2), andtheRH side repeater lamp
(C012-1). These3lamps areconnected inparallel andareallfed by
green/white wires.Power isalso supplied tothe instrument packwarning lamp
(C230-9) onagreen/white wire.Alllamps areearthed onblack wires. Withthe
circuit complete, theflasher unitcommences openingandclosing thecircuit,
causing theRH indicator lampstoflash. 
						

							DESCRIPTIONANDOPERATION
DEFENDER 97MY 4.25
Hazards
Thehazard warning switch(C096-7) issupplied withapermanent feedfrom
fuse 1(C580-2) ofthe passenger compartment fuseboxonapurple wire.
Pressing theswitch tothe onposition allowspowertoflow through theswitch
(C096-5) tothe flasher unit(C547-85) onalight green wire.Theflasher unit
(C547-87) isconnected tothe following viathe hazard warning switch
(C096-2).
Hazard warning lamptelltale (C913-1) byabrown/red wire.RHfront direction indicatorlamp(C002-2) byagreen/white wire.RHrear direction indicatorlamp(C402-2) byagreen/white wire.InstrumentpackRHindicator warninglamp(C230-9) byagreen/white wire.LHfront direction indicatorlamp(C001-2) byagreen/red wire.LHrear direction indicatorlamp(C403-2) byagreen/red wire.Instrument packLHindicator warninglamp(C230-10) byagreen/red wire.
With theflasher unitenergized, thecircuit isrepeatedly openandclosed,
causing allindicator lampstoflash. 
						

							DESCRIPTIONANDOPERATION
4.26 DEFENDER97MY
INTERIOR
LAMPS
DESCRIPTION Dependant onmodel, theDefender isprovided witheither oneortwo interior
lamps. Oneinthe front, andoneinthe rear ofthe vehicle (iffitted). Bothlamps
can beswitched onmanually usingtheirintegral switches. Ifany door,
including thetaildoor, areopened, thelamp(s) willilluminate.
If an immobilisation systemisfitted tothe vehicle, thelamps arecontrolled by
the Alarm ECU.TheECU contains atime outfeature whichswitches offthe
interior lampsaftereight minutes ifany door isleft open, thuspreventing
unnecessary batterydrain.
OPERATION
Non -immobilisation (Defender90Hard Toponly)
Feed fromthepositive batteryterminal isconnected tofusible link2(C632-1)
of the engine compartment fuseboxbyabrown wire.Fusible link2(C907-2) is
connected tofuse 2(C580-3) ofthe passenger compartment fuseboxbya
brown wire.
Fuse 2ofthe passenger compartment fusebox(C580-4) suppliesacurrent to
both thefront (C317-3) andrear (C356-3) interiorlampsonpurple wires.Both
lamps areconnected inparallel. Thefront interior lamphasanintegral switch.
With thisswitch inthe off(normal) position(C317-1) thelamp canonly be
earthed bythe LH(C266-1) andRH(C265-1) doorswitches. Bothswitches are
connected inparallel bypurple/blue wires.Withthefront doors inthe closed
position bothdoor switches areopen, failing toprovide aroute toearth.
Therefore thelamp does notilluminate. Ifeither theLHorRH door isopened,
the circuit iscompleted andthefront interior lampwillilluminate.
With theintegral switchinthe onposition (C318-1) adirect routetoearth is
provided onablack wire,illuminating thelamp.
The rear interior lamp(C356-1) isconnected tothe taildoor switch (C751-1) by
a purple/blue wire.Ifthe taildoor isopened, thecircuit iscompleted andthe
rear interior lampwillilluminate. 
						

							DESCRIPTIONANDOPERATION
DEFENDER 97MY 4.27
Immobilisation(Defender90&110 Hard Toponly)
Feed fromthepositive batteryterminal isconnected tofusible link2(C632-1)
of the engine compartment fuseboxbyabrown wire.Current flowsthrough
fusible link2(C907-2) tofuse 2(C580-3) ofthe passenger compartment fuse
box onabrown wire.
Fuse 2ofthe passenger compartment fusebox(C580-4) isconnected tothe
front interior lamp(C317-2) byapurple wire.Theinterior lamphasanintegral
switch. Withthisswitch inthe off(normal) position(C317-1), afeed issent to
the alarm ECU(C061-1). TheAlarm ECUisconnected (C061-16)tothe tail
door switch (C751-1) andtheLHdoor switch (C033-1), whicharewired in
parallel. Bothareconnected bypurple/blue wires.Withbothofthese doors
closed, thedoor switches areopen, andfailtoprovide aroute toearth forthe
ECU. Ifeither doorisopened, theswitch isclosed, providing aroute toearth
and illuminating theinterior lamp.
The alarm ECU(C061-5) isalso connected tothe RH door switch (C054-1) on
a slate/white wire.Withthedoor closed, thedoor switch isopen, andfails to
provide aroute toearth forthe ECU. Ifthe door isopened, theswitch isclosed,
providing aroute toearth andilluminating theinterior lamp.
With theinterior lampswitch inthe onposition (C318-1), adirect routetoearth
is provided onablack wire,illuminating thelamp.
The alarm ECUalsoreceives asignal fromtheRFhandset (seeengine
immobilisation). Whenthecorrect signalisreceived, thealarm ECUwill
illuminate theinterior lamp.Thelamp willremain illuminated untileither the
alarm isre- armed usingthehandset, theignition isswitched toposition II,or
the time outperiod elapses. 
						

							DESCRIPTIONANDOPERATION
4.28 DEFENDER97MY
Immobilisation (Defender110Truck Cabonly)
Feed fromthepositive batteryterminal isconnected tofusible link2ofthe
engine compartment fusebox(C632-1) byabrown wire.Fusible link2
(C907-2) isconnected tofuse 2(C580-3) ofthe passenger compartment fuse
box byabrown wire.
Fuse 2ofthe passenger compartment fusebox(C580-4) suppliesacurrent to
the interior lamp(C357-3) onapurple wire.Theinterior lamphasanintegral
switch. Withthisswitch inthe off(normal) position(C357-1) theonly earth path
is via the alarm ECU(C061-1) onapurple/white wire.
The alarm ECU(C061-16) isconnected tothe LHdoor switch (C033-1) bya
purple/blue wire.Ifthe LHdoor isclosed, thedoor switch isopen, andfails to
provide aroute toearth forthe ECU. Ifthe door isopened, theswitch isclosed,
providing aroute toearth andilluminating theinterior lamp.Thealarm ECU
(C061-5) isalso connected tothe RH door switch (C054- 1),this time bya
slate/white wire.TheRHdoor switch operates inthe same wayasthe LHdoor
switch. With theinterior lampintegral switchinthe onposition (C563-1), adirect route
to earth isprovided onablack wire,illuminating thelamp.
The alarm ECUalsoreceives asignal fromtheRFhandset (seeengine
immobilisation). Whenthecorrect signalisreceived, thealarm ECUwill
illuminate theinterior lamp.Thelamp willremain illuminated untileither the
alarm isre- armed usingthehandset, theignition isswitched toposition II,or
the time outperiod elapses. 
						

							DESCRIPTIONANDOPERATION
DEFENDER 97MY 4.29
Immobilisation(Defender90/110 Station Wagon, &Crew Cab)
Feedfromthepositive batteryterminal isconnected tofusible link2(C632-1)
of the engine compartment fuseboxbyabrown wire.Fusible link2(C907-2) is
connected tofuse 2(C580-3) ofthe passenger compartment fuseboxbya
brown wire.Fuse 2ofthe passenger compartment fusebox(C580-4) supplies
a current tothe front interior lamp(C357-3) andtherear interior lamp(C925-3),
which areconnected inparallel. Bothlamps arefedbypurple wires.
The front interior lamphasanintegral switch.Withthisswitch inthe off
(normal) position(C357-1), theonly earth pathisvia the alarm ECU(C061-1)
on apurple/white wire.
The alarm ECU(C061-5) isconnected tothe RH front door switch (C054-1) by
a slate/white wire.Ifthe RH front door isclosed, thedoor switch isopen, and
fails toprovide aroute toearth forthe ECU. Ifthe door isopened, theswitch is
closed, providing aroute toearth andilluminating theinterior lamp.Thealarm
ECU (C061-16) isalso connected tothe LHfront door switch (C033-1), this
time byapurple/blue wire.TheLHfront door switch operates inthe same way
as the RH door switch.
Connected inparallel withtheLHfront door switch isthe taildoor switch
(C751-1), theRH rear door switch (C930-1), andtheLHrear door switch
(C930-1). Allthree switches areconnected bypurple/blue wiresandwork inthe
same wayasthe RH front door switch.
With thefront interior lampintegral switchinthe onposition (C563-1), adirect
route toearth isprovided onablack wire,illuminating thelamp. 
						

							DESCRIPTIONANDOPERATION
4.30 DEFENDER97MY
The
rear interior lampoperates inthe same wayasthe front interior lamp.
When theintegral switchisin the off(normal) position(C925-1), theonly earth
path isvia the alarm ECU(C061-1) onapurple/white wire.Thedoor switches
are fedbythe alarm ECUasbefore.
With therear interior lampintegral switchinthe onposition (C563-1), adirect
route toearth isprovided onablack wire,illuminating thelamp.
The alarm ECUalsoreceives asignal fromtheRFhandset (seeengine
immobilisation). Whenthecorrect signalisreceived, thealarm ECUwill
illuminate theinterior lamp.Thelamp willremain illuminated untileither the
alarm isre- armed usingthehandset, theignition isswitched toposition II,or
the time outperiod elapses.