1998 BMW 318i headlight

612-4



SWITCHES
AND
ELECTRICAL
ACCESSORIES

Fig
.
6
.



Ignition
switch
set
screws
(arrows)
.

Ignition
lock
cylinder,
replacing

NOTE-

On
cars
with
EWS
11(production
date
1/95
and
later),
the
ring
antenna
surrounding
the
ignition
switch
must
be
removed
.
See
515
Central
Locking
and
Anti-theft
.

1
.
Insert
master
key
finto
lock
cylinder
and
turn
60°
to
"ra-
dio"
position
.
See
Fig
.
7
.

Fig
.
7
.



Turn
ignition
switch
60°
to
"radio"
position
(arrow)
.

2
.
Insert
a
thin
piece
of
stiff
wire
into
opening
in
lock
cylin-
der
and
pull
lockcylinder
out
.
See
Fig
.
8
.

NOTE-

On
early
cars
(up
to
production
date
1ol95),
turn
lock
cylinder
back
12°
to
release
.

INTERIOR
SWITCHES

0012555
0011807
0011808

Fig
.
8
.



With
ignition
key
in
"radio"position,
insert
stiff
wire
into
lock
opening
to
release
cylinder
.

Headlight
and
Foglight
Switch
Assembly

The
headlight
and
foglight
switches
are
retained
in
the
left

dashboard
insert
.
This
alsocontains
the
driver's
side
face
lev-

e¡
air
vents
.
To
service
either
switch,
remove
insert
byremov-
ing
a
single
screw
.
See
Fig
.
9
.

NOTE-

Access
to
electrical
hamess
connectors
behind
dash
insert
may
be
easier
if
lower
left
dash
trim
and
driverside
knee
bolsterare
removed
.
See
513
Interior
Trim
.

Fig
.
9
.



Remove
retaíning
screw
to
pull
out
left
dash
insert
(arrow)
.

Headlight
switch,
replacing

1
.
Remove
left
side
dash
insert
and
disconnect
harness
connector
to
headlight
switch
.
See
Fig
.
10
.

3
.
Remove
nut
mounting
switch
to
dash
insert
.
See
Fig
.
11
.

Fig
.
11
.
Headlight
switch
mounting
nut
(arrow)
.

4
.
Pull
switch
out
from
housing
.

SWITCHES
AND
ELECTRICAL
ACCESSORIES



612-5

0012558

5
.
Installation
is
reverse
of
removal
.
Align
new
switch
to
dash
insert
.
See
Fig
.
12
.

Tightening
Torque

"
Headlight
switch
retaining
nut
.
......
2
Nm
(18
in-lb)

Foglight
switch,
replacing
0012559
Fig
.
10
.
Removing
headlightswitch
electrical
harness
connector



1
.
Remove
left
side
dash
insert,
as
described
earlier,
and
(arrow)
.



remove
foglight
switch
harness
connector
.

2
.
PA
off
headlight
switch
knob
.
Wrapping
adhesive
tape
aroundknob
facilitates
removal
.



spring
tabs
together
.

0012560
Fig
.
12
.
Fit
groove
on
headlightswitch
into
switch
bezel
ondash
insert
(arrows)
.

2
.
Slide
foglight
switch
out
of
dash
insert
by
sqúeezing

3
.
Installation
is
reverse
of
removal
.

Hazard
warning
switch,
replacing

1
.
Unclip
shift
boot
and
lift
up
from
shift
lever
console
.
Carefully
remove
insulation
pad
.
See
250
Gearshift
Linkage
.

2
.
Working
underneath
center
console,
push
hazard
warning
switch
up
and
out
of
console
with
your
fingers
.

3
.
Disconnect
harness
connector
from
switch
.

4
.
Installation
is
reverse
of
removal
.

Power
window
switch,
replacing

1
.
Unclip
shift
boot
and
lift
up
from
shift
lever
console
.
Carefully
remove
insulation
pad
.
See250
Gearshift
Linkage
.

2
.
Working
underneath
center
console,
push
window
switch
up
out
of
console
with
your
fingers
.
See
Fig
.
13
.

3
.
Disconnect
harness
connector
from
switch
.

4
.
Installation
is
reverse
of
removal
.

INTERIOR
SWITCHES

FRONT
LIGHTING
.
...........
.
....
.
.
.
.
630-1

Headlight
buib,
replacing
............
.
.
.
.
630-1
Headlight
assembly,

removing
and
installing
.......
.
....
.
.
.
.
630-2

Foglight
assembly,
removing
and
installing
..
630-3

Front
turn
signal
assembly,
removing
and
installing
.....
.
.
.
........
630-4

GENERAL

The
headlight
and
foglight
assemblies
usehalogen
bulbs
.
To
ensure
the
longevity
of
halogen
bulbs,
the
bulb
glass
should
not
be
handied
.
Dirt
and
skin
oíls
may
cause
a
bulbto
fail
prematurely
.
If
necessarywipe
bulb
using
a
clean
cloth

dampened
with
rubbing
alcohol
.

NOTE-

Use
only
original
equipment
replacement
bulbs
.
Non-
original
equipment
bulbs
may
cause
false
failure
read-
ings
on
the
check
control
display
(where
applicable)
.

WARNING
-

INhenworking
on
electrical
systems,
remove
the
fuse
protecting
the
circuit
under
repair
.
See
610
Electrical
Component
Locations
.

FRONT
LIGHTING

Headlight
bulb,
replacing

1
.
Open
engine
hood
.

2
.
Working
in
back
of
headlight
assembly,grasp
rear
of

bulbsocket
(harnessconnector)
and
turn
counterclock-

wise
90°
.
Pull
bulb
out
of
headlight
assembly
.
See
Fig
.
1
.

3
.
Disconnect
harness
connector
from
bulb
.

CA
UTION-

Do
not
touch
halogen
bubs
with
yourbare
hands
.
If
necessary
wipe
bulb
using
a
clean
cloth
damp-

ened
with
rubbing
alcohol
.

630
Exterior
Lighting

EXTERIOR
LIGHTING



630-1

GENERAL
.
.
.
.
...
.
................
.
.
.
.
630-1



Side
Marker
Lights
.......
.
.
.
.
.
.......
.
..
630-4

REAR
LIGHTING
.
......
.
.
.
.
.
.
.
...
.
.
.
..
630-4

Taillight
Bulbs
..........
.
.
.
.
.
.....
.
.
.
.
.
630-4

Taillight
assembly,
removing
and
installing
.
.
.
630-5

CenterBrake
Light
.......
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
630-5

Center
brake
light
housing,
replacing

(4-door
and
coupe
models)
.
.
.
.
.......
.
.
.630-5

License
plate
light,
removingand
installing



.
.630-6

0012567

Fig
.1.



Torelease
bulbfrom
headlight
assembly,
rotate
socket
coun-
terclockwise
to
disengage
retaining
tabs
(arrows)
.
Right
side
bulb
is
shown
in
unlocked
position
.
Note
that
bottom
tab
A
is
wider
than
other
two
.

4
.
Installation
is
reverse
of
removal
.
Align
tabs
on
bulb

base
to
cutouts
on
rear
of
lens
assembly
.
Secure
bulb

by
rotating
clockwise
90°
.

Bulb
Applications

"
Low
beam
headlight
bulb
...
.
..
..
.........
H9006

"
High
beam
headlight
bulb
..
.
..
..
.........
H9005

FRONT
LIGHTING

630-2



EXTERIOR
LIGHTING

Headlight
assembly,

removing
and
installing

CAUTION-

Followingheadlight
assembly
work
headlight

beam
aim
must
be
adjusted
using
special
equip-
ment
.

1
.
Left
side
:
Remove
air
filter
housing,
air
intake
duct,
and

air
mass
meter
.
See
100
Engine-General
.

2
.
Disconnect
harness
connectors
from
headlight
bulbs
.

3
.
Remove
front
turn
signal
.
See
Front
turn
signal
as-

sembly,
removingand
installing
later
in
this
repair

group
.

4
.
Remove
radiator
cover
.
See
Fig
.
2
.

5
.
Using
a
wrench,
brace
adjusting
nut
at
top
center
of
headlight
.
Remove
three
screws
at
top
of
assembly
.

See
Fig
.
3
.

Fig
.
3
.



Brace
headlightadjustingnut
as
shown
and
remove
top
screws
(arrows)
.

FRONT
LIGHTING

0012568
0012569

6
.
Remove
two
screwson
bottom
of
assembly
.
See
Fig
.

4
.

0012567a

Fig
.
4
.



Headlight
bottom
retaining
screws
(arrows)
.
Screws
mount
in
threaded
expanding
rivets
which
act
as
headlightheight

adjusters
.

7
.
Remove
headlight
assembly
from
front
.

8
.
On
installation,
tighten
lower
screws
first
while
holding

expanding
rivets
with
a
wrench
.
There
should
be
a
2
.5

mm
gap
between
bottom
oflens
and
front
panel
.
Use

adjusting
nut
to
raise
or
lower
headlight
unit
.
See
Fig
.
5
.

0012681

Fig
.
5
.



Measure
gap
A
(2.5
mm)
between
bottom
of
headlight
as-
sembly
and
front
panel
.

9
.
Clearance
between
hood
and
headlight
cover
should
be
1
.5
mm
.
Adjust
by
turning
upper
headlight
adjustinq
nuts,
then
tighten
down
center
screw
.
See
Fig
.
6
.

4

Foglight
assembly,

removing
and
installing

1
.
Foglight
lens
release
catch
2
.
Foglight
lensrear
protective
cap
3
.
Foglight
bulb
4
.
Foglight
lens

Fig
.
7
.



Foglight
assembly
(removed)
.

0012682

Fig
.
6
.



Measure
gap
B
(1.5
mm)
between
front
of
hood
and
headlight
cover
.
Note
horizontal
headlightadjusting
nut
(1)
and
retaining
screw
(2)
.

The
following
procedure
covers
foglight
lens
and
foglight

buib
replacement
.
Foglight
components
are
shown
in
Fig
.
7
.

0012683

EXTERIOR
LIGHTING



630-
3

1
.
Insert
a
screwdriver
in
upper
air
duct
inlet
of
front
lower
valence
and
disengage
foglight
lens
catch
mechanism
.
Swing
light
outward
and
gently
disengage
hinged
end
.
See
Fig
.
8
.

Fig
.
8
.



Insert
screwdriver
in
upper
air
duct
inlet
.
uu¡¿biu

2
.
Remove
rear
protection
capand
disengage
steel
wire
foglight
bulb
clamp
.

3
.
Remove
bulb
from
rear
of
foglight
assembly
.
Discon-
nect
electrical
harness
from
foglight
bulb
.

CAUTION
-

Do
not
touch
halogen
bulbs
with
yourbare
hands
.
If
necessary
wipe
buib
using
a
clean
cloth
damp-ened
withrubbing
alcohol
.

4
.
Installation
is
reverse
of
removal
.
Check
electrical
con-nector
for
corrosion
.
Spray
with
contact
cleaner,
if
nec-
essary
.

Bulb
Application
(USA
Models)
:

"
Foglight
bulb



......
...
..
...
..........
Hl
(55w)

FRONT
LIGHTING

630-
4



EXTERIOR
LIGHTING

Front
turn
signal
assembly,



Side
Marker
Lights

removing
and
installing
Side
marker
lights
on
later
model
E36
cars
are
snapped
into

The
procedurebelow
also
includes
turn
signal
bulb
replace-



the
front
fenders
.
To
service,
carefully
pry
the
assembly
out
of

ment
.



the
fender,
then
detach
the
electrical
harness
connector
and

bulb
socket
.

1
.
Working
inside
engine
compartment,usea
screwdriver

to
press
turn
signal
assembly
retaining
clip
away
from

retaining
tab
on
headlight
assembly
frame
.
Push
turn



REAR
LIGHTING

signal
forward
.
See
Fig
.
9
.

Fig
.
9
.



Press
on
clip
(arrow)
.
Light
slides
straight
out
.

REAR
LIGHTING

0012571

2
.
Depress
tabs
on
bulb
socket
and
remove
from
turn
sig-

nal
assembly
.
See
Fig
.
10
.

0012572

Fig
.
10
.
Depress
locking
tabs
(arrows)to
remove
bulb
and
socket
from
turn
signal
housing
.

Taillight
Bulbs

To
access
taillight
bulbs,
see
Fig
.
11
.
The
location
of
the

rear
bulbs
are
shown
in
Fig
.
12
.
Turn
bulb
socket
1
/4turn
to
re-

move
.

Fig
.
11
.
To
remove
taillight
bulb
cover,
turn
retainer
(arrow)
1
/a
turn

counterclockwise
.

Fig
.
12
.
Taillight
bulb
identification
.

0012574

Fig
.
42
.
Upper
A/C
condensermounting
bolts
(arrows)
.

8
.
Before
recharging,
evacuate
system
for
at
least
30
min
.
Recharge
system
following
equipment
manufacturer's
instructions
.
See
Table
d
.
A/C
System
Refrigerant

Capacities
.

A/C
receiver/drier,
replacing

The
A/C
receiver/drier
is
mounted
in
the
front
right
cornee
of
the
engine
compartment
behind
the
headlight
assembly
.

CAUTION-

The
receiver/drier
must
be
replaced
when
-There
is
dirt
in
the
AIC
system
-The
compressor
has
seized
or
has
been
re-
placed
for
any
reason
-The
condenser
or
evaporator
are
replaced
for
any
reason
-The
AIC
system
is
leaking
and
there
is
no
more
refrigerant
-The
AIC
system
was
open
for
24
hours
or
more
.

1
.
Following
manufacturer's
instructions,
connectan
ap-

proved
refrigerant
recovery/recycling/recharging
unit
to

A/C
system
and
discharge
system
.

2
.
Remove
right
headlight
assembly
.
See
630
Exterior
Lighting
.

CAUTION-
3
.
Disconnect
A/C
electrical
harness
connectors
.
See
Fig
.



Always
replaceO-rings
when
reconnecting
refrig-
43
.



erant
lines
.

4
.
Remove
refrigerant
pressure
lines
from
receiver/drier
.

Plug
lines
immediately
.

5
.
Remove
receiver/drier
mounting
bolts
.

0013182

6
.
Remove
underbody
splash
shield
on
passenger
side
.

See
Fig
.
44
.

7
.
Remove
passenger
side
brake
cooling
duct
.
Discon-

nect
outside
temperature
sensor
harness,
if
applicable
.

HEATING
AND
AIR
CONDITIONING



640-15

0012669

Fig
.
43
.
A/
C
receiver/drier
electrical
harness
connectors
(A),
pressure
line
retaining
bolts
(B),
andmounting
bolts
(C)
.

0012668
Fig
.
44
.
Passenger
sidesplash
shield
retaining
screws
(arrows)
.

8
.
Push
receiver/drier
down
andremove
from
underneath
car
.
Make
sure
that
receiver/drier
is
clear
of
any
electri-
cal
harnesses
.

9
.
Installation
is
reverse
of
removal
.

10
.
Before
recharging,
evacuate
system
for
at
least
30
min
.

Recharge
system
following
equipment
manufacturer's

instructions
.
See
Table
d
.
A/C
System
Refrigerant

Capacities
.

AIR
CONDITIONING

GENERAL

This
section
contains
wiring
diagrams
for
1992
through

1998
BMW
3
Series
models
.

WARNING
-

On
cars
equipped
with
airbags,
special
precautions
apply
to
any
electrical
testing
or
repair
.
The
airbag
unit
is
an
explosive
device
and
must
be
handled
with
exterme
care
.
Before
starting
any
work
onan
airbag
equipped
car,
refer
to
the
warnings
and
cau-
tions
in
720
Seatbelts
and
721
Airbag
Systems
(SRS)
.

NOTE-

The
"



gear
position/neutral
safetyswitch
is
also
some-
timesreferred
to
as
the
automatic
transmission
range
switch
.

"
The
EWS
11
system
is
also
sometimes
referred
to
as
the
Driveaway
Protection
System
or
the
electronic
im-
mobilization
system
.

ELECTRICAL
WIRING
DIAGRAMS



ELE-1

Electrical
Wiring
Diagrams

GENERAL
.
.
.
.
.
.
.
.
.
................
.
.
.
ELE-1



Horns



.....
.
.....
.
.
.
....
.
.
.
.
.
...
.
.
ELE-153

Instrument
Panel
.
.
.
.
.
.
..............
ELE-165

ELECTRICAL
WIRING
DIAGRAMS
...
.
.
.
ELE-2



Interior
Lights/Illumination
.............
ELE-211

ABS



..............
.
.
.
.....
.
.....
ELE-117



Lumbar
Control
.
....................
ELE-247

ABS/AST
.............
.
.
.
...
.
.
.
.....
ELE-120



On-Board
Computer
..................
ELE-173

Airbag
(Supplemental
Restraint
System)
..
ELE-140



Park
Ventilation
.
.
.
...........
.
...
.
..
ELE-139

Air
Conditioning
and
Heating
.
.
.
.
.
.
.....
ELE-129



Power
Distribution
......
.
...
.
.
.
.
.
.
.
...
.
ELE-2

Anti-Theft
(Alpine)
..........
.
.
.
...
.
...
ELE-144



Power
Door
Locks
.
.
......
.
.
.
.
.
.
.
.
.
..
ELE-226

Anti-Theft
(EWS
II)
.
........
.
.
.
...
.
...
ELE-150



Power
Mirrors
...
.
.
.
......
.
.
.
.
.
.
.
.
.
..
ELE-241

Body
Computer
Module
.....
.
.....
.
...
ELE-176



Power
Seats
......
.
......
.
.
.
...
.
.
.
..
ELE-243

Charging
System



.
.
................
.
.
.
ELE-67



Power
Sunroof
.
.
.
.
.
.
.
...............
ELE-248

Convertible
Top
.
.
.
.
................
.
.
ELE-253



Power
Windows
.
.
.
.
.
.
.....
.
.........
ELE-231

Cruise
Control
..
.
.
.
...........
.
....
.
.
ELE-112



Radio/Cassette/CD/Speakers
..........
ELE-255

Data
Link
Connector
................
.
.
.
ELE-86



Rear
Window
Defogger
...............
ELE-160

Engine
Cooling
.......
.
.......
.
....
.
.
.
ELE-94



Shift
Interlock
.
.
.
.
.
.
.
.
...............
ELE-110

Engine
Management
...
.
.......
.
....
.
.
.
ELE-70



Starting
....
.
.
.
.
.
...
.
................
ELE-63

Exterior
Lights
........
.
.
.
.
.
.
.
.
.
......
ELE-194



Transmission
Electronics
.
..............
ELE-96
Ground
Distribution
....
.
.
.
.
.
.
.
.
.
.......
ELE-35



Warning
System
:
Chimes
.............
ELE-178

Headlights/Foglights
...
.
.
.
.
.
.
.
.
.
......
ELE-180



Wiper/Washer
.
.....
.
...............
ELE-155

Heated
Seats
........
.
.
.
.
.
.
.
.
.
......
ELE-245

ELECTRICAL
COMPONENT
LOCATIONS

Relayand
fuse
positions,
ground
locations
...........
.
.
.
.
.
.
.
.
.
................
seeRepair
Group
610

CAUTION-

Always
switchthe
ignition
off
and
disconnect
the
negative
(-)
battery
cablebefore
removing
any
electrical
components
.

"
Prior
to
disconnecting
the
battery,
read
the
bat-tery
disconnection
cautions
given
at
the
front
of
this
manual
on
page
viii
.

"
Connect
and
disconnect
ignition
system
wires,
multiple
connectors
and
ignition
test
equipment
leads
only
while
ignition
is
switched
off
.

-Always
switch
a
test
meter
to
the
appropiate
func-
tion
and
range
before
making
test
connections
.

"
All-Season
Traction
(AST)
is
also
referred
to
as
ASC
or
ASC+T
.

GENERAL