1998 BMW 318i ignition switch
[x] Cancel search: ignition switchPage 383 of 759
NOTE
-
Sometimes
the
color
of
en
installed
wire
may
be
differ-
ent
than
the
one
on
the
wiring
diagram
.
Don't
be
con-
cerned
.
Just
be
sure
lo
confirm
that
the
wire
connects
lo
the
proper
terminals
.
Wire
color
codes
"
BLU
.........
.
..
..
...
.
.................
Blue
"
BRN
....:....
.
..
..
...
..
...............
Brown
"
YEL
.........
.
..
..
...................
.Yellow
"
GRN
.........
.
..
..
...
.
................
creen
"
G
RY
.......
.
.
.
..
..
.....................
G
ray
"
ORG
.........
.
..
..
...
.
..............
.Orange
"
RED
......
...
.
.
..
.....................
.Red
"
BLK
.........
.
..
..
...
.
................
Black
"
VIO
..........
.
..
...
..
..
.......
.
.......
Violet
"
WHT
.........
.
.
....
.
...
:..............
White
Table
a
.
Terminal
and
Circuit
Numbers
Number
1
Circuít
description
1
j
Low
voltage
switched
terminal
of
coi¡
4
1
High
voltage
center
termina¡
of
coi¡
+x
Originates
atignition
switch
.
Supplies
powerwhen
the
ignition
switch
is
in
the
PARK,
RUN,
or
START
position
15
Originates
atignition
switch
.
Supplies
powerwhen
ignition
switch
is
in
RUN
or
START
position
30
Battery
positive
(+)
voltage
.
Supplies
power
whenever
battery
is
connected
.
(Not
dependent
on
ignition
switch
position,
unfused)
31
1
Ground,
battery
negative
(-)
terminal
50
Supplies
power
from
battery
to
starter
solenoid
when
ignition
switch
isin
START
position
only
+54
Originates
atignition
switch
.
Supplies
power
when
ignition
switch
isin
the
RUN
position
only
85
1
Ground
side
(-)
ofrelay
coil
86
1
Power-in
side
(+)
ofrelay
coil
87
1
Relay
actuatedcontact
D
Alternator
warning
light
and
field
energizing
circuit
ELECTRICAL
SYSTEM-GENERAL
600-
3
Additional
abbreviations
shown
in
the
wiring
diagrams
are
given
below
.
Abbreviations
"
ABS
........
.
...
.
...
.
..........
antilock
brakes
"
A/C
........
.
...
..
..
.
.........
.airconditioning
"
AST/ASC+T
.......
...
.
.
.......
al¡
season
traction
"
CONV
.......
.
.
...
.................
convertible
"
DME
........
.
.
...
.......
digital
motor
electronics
"
ECM
.......
.
...
..
..
.
..
electronic
control
module
"
EWS/EWS
II
......
...
.
.
coded
driveaway
protection
"
SRS
........
.
supplemental
restraint
system-airbag
"
TCM
........
.
..
....
.
transmission
control
module
"
ZKE
(94-98
models)
..
..
.
...
central
body
electronics
"
ZVM
(92-93
models)
...
.
.
..
.
.......
central
locking
ELECTRICAL
TROUBLESHOOTING
Most
terminals
are
identified
by
numbers
on
the
compo-
nents
and
harness
connectors
.
The
terminal
numbers
for
ma-
Four
things
are
required
for
current
toflow
in
any
electrical
jor
electrical
connections
are
shown
in
the
diagrams
.
Though
circuit
:
a
voltagesource,
wires
or
connections
to
transport
the
many
terminal
numbers
appear
only
once,
severa¡other
num-
voltage,
a
load
or
device
that
uses
the
electricity,
and
a
con-
bers
appear
in
numerous
places
throughout
the
electrical
sys-
nection
to
ground
.
Most
problemscanbefound
using
a
digital
tem
and
identify
certain
types
ofcircuits
.
Some
of
the
most
multimeter
(volt/ohm/amp
meter)to
check
for
voltage
supply,
common
circuit
numbers
are
listed
below
in
Table
a
.
for
breaks
in
the
wiring
(infinite
resistance/no
continuity),
orfor
a
path
to
ground
that
completesthe
circuit
.
Electric
current
is
logical
in
its
flow,
always
moving
from
the
voltage
sourcetoward
ground
.
Electricalfaults
can
usually
be
located
through
a
process
of
elimination
.
When
troubleshoot-
ing
a
complex
circuit,
separate
the
circuit
into
smaller
parts
.
The
general
testsoutlined
below
may
be
helpful
in
finding
electrical
problems
.
The
information
is
most
helpful
when
used
with
the
wiring
diagrams
.
Be
sure
to
analyze
the
problem
.
Use
the
wiring
diagrams
to
determine
the
most
likely
cause
.
Getan
understanding
of
how
the
circuit
works
by
following
the
circuit
from
groundback
to
the
power
source
.
When
making
test
connections
at
connectors
andcompo-
nents,
use
care
to
avoidspreading
or
damaging
the
connec-
tors
or
terminals
.
Some
tests
may
require
jumper
wires
to
bypass
components
or
connections
in
the
wiring
harness
.
When
connecting
jumper
wires,
use
bladeconnectors
at
the
wire
ends
that
match
the
size
of
the
terminal
being
tested
.
The
small
interna¡
contacts
are
easily
spread
apart,
and
this
can
cause
intermittent
or
faultyconnections
that
can
leadto
more
problems
.
ELECTRICAL
TROUBLESHOOTING
Page 384 of 759
600-
4
ELECTRICAL
SYSTEM-GENERAL
Voltage
and
Voltage
Drops
The
wires,
connectors,
and
switches
that
carry
current
are
designed
with
very
low
resistance
so
that
current
flows
with
a
minimum
loss
of
voltage
.
A
voltage
drop
is
caused
by
higher
than
normal
resistance
in
a
circuit
.
This
additional
resistance
actually
decreases
or
stops
the
flow
of
current
.
A
voltage
drop
can
be
noticed
byproblems
ranging
fromdim
headlights
to
sluggish
wipers
.
Some
common
sources
of
voltage
drops
are
corroded
or
dirty
switches,
dirty
or
corroded
connections
or
contacts,
and
loose
or
corroded
ground
wires
and
ground
con-
nections
.
A
voltage
drop
test
is
a
good
test
to
make
if
current
is
flowing
through
the
circuit,
butthe
circuit
is
not
operating
correctly
.
A
voltage
drop
test
will
help
to
pinpoint
a
corroded
ground
strap
or
a
faulty
switch
.
Normally,
there
should
be
less
than
1
volt
drop
across
most
wires
or
closed
switches
.
A
voltage
drop
across
a
connector
or
short
cable
shouldnot
exceed
0
.5
volts
.
Voltage,
measuring
1
.
Connect
digital
multimeternegative
lead
to
a
reliable
ground
point
oncar
.
NOTE-
The
negative
(-)
battery
terminal
is
alwaysa
good
ground
point
.
2
.
Connect
digital
multimeter
positive
lead
to
point
incir-
cuit
you
wish
to
measure
.
See
Fig
.
1
.
If
a
reading
is
ob-
tained,
current
is
flowing
through
circuit
.
NOTE-
The
voltage
reading
shouldnot
deviate
more
than
1
volt
from
the
voltage
at
the
battery
.
If
the
voltage
drop
is
more
than
this,
check
for
acorroded
connector
or
cose
ground
wire
.
ELECTRICAL
TROLIBLESHOOTING
from
Battery
Fig
.
1
.
Digital
multimeterbeing
used
to
test
voltage
.
No
voltage
r_l
-1
Load
LJ
Switch
NOTE-
The
maximum
voltage
drop
in
an
automotive
circuit,
as
recommended
by
the
Society
of
AutomotiveEngineers
(SAE),
is
as
follows
:
0
voltsfor
small
vire
connections
;
0
.1
Volts
for
high
current
connections
;
0
.2
volts
for
high
current
cables
;
and
0
.3volts
for
switch
or
solenoidcon-
tacts
.
On
longer
wires
or
cables,
the
drop
may
be
slight-ly
higher
.
In
any
case,
a
voltage
drop
of
more
than
1.0volt
usually
indicates
a
problem
.
0013238
NOTE-
"
A
voltage
drop
test
is
generally
more
accuratethan
a
Voltage
drop,
testing
simple
resistance
check
because
the
resistances
in-
volvedare
often
too
small
to
measure
with
most
ohm-
Voltage
drop
can
only
be
checked
when
current
is
running
meters
.
For
example,
a
resistance
as
small
as0
.02
through
the
circuit,
suchasby
operating
the
starter
motor
or
ohms
would
results
in
a
3
volt
drop
in
a
typical
150
turning
onthe
headlights
.
A
digital
multimeter
should
beused
amp
starter
circuit
.
(150
amps
x
0
.02
ohms
=3
volts)
.
lo
ensure
accurate
readings
.
"
Keep
in
mind
that
voltage
with
the
key
on
and
voltage
with
the
engine
running
arenotthe
same
.
With
the
ig-
1
.
Connect
digital
multimeter
positive
lead
to
positive
(+)
nition
on
and
the
engine
off
(battery
voltage),
voltage
battery
terminalor
a
positive
power
supply
close
lo
bat
should
be
approximately
12
.6volts
.
With
the
engine
tery
source
.
running
(charging
voltage),
voltage
should
be
approx-
imately
14
.0
volts
.
Measure
voltage
at
the
battery
with
2
.
Connect
digital
multimeter
negativelead
to
other
end
of
the
ignition
on
and
then
with
the
engine
running
to
get
cable
orswitch
being
tested
.
See
Fig
.
2
.
exact
measurements
.
3
.
With
power
on
and
circuit
working,
meter
shows
volt-
age
drop
(difference
between
two
points)
.
This
value
should
not
exceed
1
volt
.
Page 385 of 759
Continuity,
checking
Short
Circuits
from
Battery
CAUTION-
Use
only
a
high
quality
digital
ohmmeter
having
high
input
impedance
when
checking
electronic
componente
.
The
internal
power
source
used
in
most
analog
(swing-need1e)
meterscan
damage
solidstate
components
.
0013239
Fig
.
2
.
Digital
multimeter
being
used
to
check
for
voltage
drop
across
a
switch
.
The
continuity
test
can
beused
to
check
a
circuit
or
switch
.
Because
most
automotive
circuits
are
designed
to
have
little
or
no
resistance,
a
circuit
or
part
of
a
circuit
canbe
easily
checked
for
faults
using
an
ohmmeter
.
An
open
circuit
or
a
cir-
cuit
withhigh
resistance
will
not
allow
current
to
flow
.
A
círcuit
with
little
or
no
resistanceallows
current
to
flow
easily
.
When
checking
continuity,
the
ignition
should
be
off
.
On
cir-
cuits
that
are
powered
at
all
times,
the
battery
should
be
dis-
connected
.
Using
the
appropriate
wiring
diagram,
a
circuit
can
be
easily
tested
for
faulty
connections,
wires,
switches,
relays,
and
engine
sensorsby
checking
forcontinuity
.
For
a
continu-
ity
check
on
a
brake
light
switch,
see
Fig
.
3
..
A
short
circuit
is
exactly
what
the
narre
implies
.
The
circuit
takes
a
shorter
paththan
it
was
designed
to
take
.
The
most
common
short
that
causes
problems
is
a
short
to
ground
where
the
insulation
on
a
positive
(+)
wire
wears
away
and
the
metal
wire
is
exposed
.
When
the
wire
rubs
against
a
metal
partof
thecar
or
other
ground
source,
the
circuit
is
shorted
to
ground
.
If
the
exposed
wire
is
live
(positive
battery
voltage),
a
Puse
will
blow
and
the
circuit
may
possibly
be
damaged
.
ELECTRICAL
SYSTEM
-
GENERAL
600-
5
Brake
light
switch
Brake
pedal
in
rest
position
Q
Brake
pedal
depressed
Brake
light
switch
Fig
.
3
.
Brake
light
switchbeing
tested
for
continuity
.
With
brake
ped-
alin
rest
position
(switch
open)
there
is
no
continuity
(infinite
ohms)
.
With
pedal
depressed
(switch
closed)
there
is
continu-
ity
(zero
ohms)
.
Shorts
to
groundcanbe
located
with
a
digital
multimeter
.
Short
circuits
are
often
difficult
to
locate
and
may
vary
in
na-
ture
.
Short
circuits
can
befound
using
a
logical
approach
based
onthe
current
path
.
CAUTION
-
"
On
circuits
protected
with
high
rating
fuses
(25
amp
and
greater),
the
wires
or
circuit
compo-
nents
may
be
damaged
before
the
fuse
blows
.
Always
check
for
damage
before
replacing
fuses
of
this
rating
.
"
When
replacing
blown
fuses,
use
only
fuses
hav-
ingthe
correct
rating
.
Always
confirm
the
correct
fuse
rating
printed
on
the
fuselrelay
panelcover
DC
ELECTRICAL
TROUBLESHOOTING
Page 387 of 759
610
Electrical
Component
Locations
GENERAL
...........
.
.
.
.
.
.
.
.
.
........
610-1
FOSE
POSITION
TABLES
..
.
.
.
.
.
.....
.
610-19
FUSE
AND
RELAY
POSITIONS
.
...
.
.
.
.
.
610-1
Fuse
Positions
.
.
.
................
.
.
.
.
.
610-1
Relay
Positions
.
.
.
.....
.
.
.
........
.
.
.
.
.
610-2
Auxiliary
RelayPanel
.....
.
...
.
........
.
610-2
SplicePanel,
Left
.
.
.
...
.
.
.
...
.
........
.
610-2
SplicePanel,
Right
.
.
.
.
.
.
.
.
...
.
.........
610-3
COMPONENT
LOCATIONS
.
.
.
.
.......
.
.610-3
Component
Location
Table
.
.
.
.
.
.
.........
610-9
GENERAL
FUSE
AND
RELAY
POSITIONS
This
repair
group
covers
f
use,
relay,
and
control
module
lo-
The
front
power
distribution
box,
an
auxiliary
relay
panel,cation
information
.
Electrical
equipment
and
accessories
in-
and
two
auxiliary
splice
panels
contain
most
of
the
fuses
and
stalled
varies
depending
on
model
and
model
year
.
Always
relays
in
E36
vehicles
.
Refer
to
the
component
location
later
confirm
that
the
proper
electrical
component
has
been
identi-
in
this
section,
as
well
as
the
tables
at
the
end
of
this
repair
fied
by
using
the
electrical
wiring
diagrams
.
group
for
electrical
component
location
.
WARNING
-
On
cars
equipped
with
airbags,
special
precautionsapply
to
any
electrical
system
testing
orrepair
.
Air-
bag
units
areexplosive
devices
and
mustbe
han-
dled
with
extremecare
.
Before
starting
any
work
onan
airbag
equipped
car,
refer
to
the
wamings
and
cautions
in
721
Airbag
System
(SRS)
.
CAUTION
-
"
Prior
to
disconnectiog
the
battery,
read
the
bat-
tery
disconnection
cautions
given
at
the
front
of
this
manual
on
page
viii
.
"
Relay
and
fuse
positions
are
subject
to
changeand
may
varyfrom
car
to
car
.
If
questions
arise,
an
authorized
BMW
dealer
is
the
best
source
for
the
most
accurate
and
up-to-date
information
.
"
A
good
way
to
verify
a
relay
position
isto
com-
pare
the
wiring
colors
at
the
relay
socket
to
thecolors
indicated
on
the
wiring
diagrams
located
at
the
rear
of
this
manual
.
"
Always
switchthe
ignition
off
and
disconnect
the
negative
(-)
battery
cable
before
removing
any
electrical
components
.
"
Connect
and
disconnect
ignition
system
wires,
multiple
connectors,
and
ignition
test
equipment
leads
only
while
the
ignition
is
switched
off
.
"
Only
usea
digital
multimeter
for
electrical
tests
.
ELECTRICAL
COMPONENT
LOCATIONS
610-1
TABLES
a
.
E36Component
Locations
...........
.
.
..
...
610-10b
.
1992
E36
Fuse
Positions
..........
..
.
.
.....
610-20c
.
1993
E36
Fuse
Positions
..........
..
..
.
....
610-22d
.
1994
E36
Fuse
Positions
.........
...
.......
610-24e
.
1995
E36
Fuse
Positions
.........
...
.......
610-26
f
.
1996
E36
Fuse
Positions
.........
...
.......
610-28g
.
1997-1998
E36
Fuse
Positions
..
.
..
...
.......
610-30
Fuse
Positions
CAUTION
-
"
Replace
fuses
with
those
of
the
same
rating
.
In-
stalling
a
fuse
with
higher
rating
can
lead
to
cir-
cuit
failure
and
may
also
start
a
fire
.
"
Relay/fuse
positions
vary
by
model
and
equip-
ment
.
Fuses
number
1
through
46
are
mounted
in
the
front
power
distribution
box
.
See
Fig
.
1.
Fuses
31-46
~
Illlllllllll
°
-
Ilmmlmomlmoi
Fuses
1-20
(a
1
:1
E
El
~
~O!7
L~~n
4~
i
Fuses
21-30
Fig
.1.
Fuse
positions
1-46
in
front
power
distribution
box
.
0013034
FUSE
AND
RELAY
POSITIONS
Page 392 of 759
610-6
ELECTRICAL
COMPONENT
LOCATIONS
Fig
.
15
.
M44
engine
harness
connectors
atair
intake
0011644
Fig
.
16
.
A/
C
recharging
ports
(arrows),
right
rear
of
engine
compart-ment
COMPONENT
LOCATIONS
0012427
811004
Fig
.
17
.
Six-cylinder
ignition
coil
in
top
of
cylinder
head
(M52
engine)
.
Fig
.
18
.
Cooling
fan
dualswitch
in
radiator
(arrow)
.
0013203
Page 399 of 759
Tablea
.
E36
Component
Locations
Component
Model
Year
Location
Refer
to
Engine
Compartment
Light
Switch
1993-1996
Over
right
headlight
assembly
Fig
.
7
.
Engine
Control
Module
(ECM)
1992-1998
Right
rear
enginecompartment,
behind
bulkhead
panel
Fig
.
7
.
Engine
Control
Module
(System)
1992-1998
I
Power
distribution
box
Fig
.
2
.
Relay
Engine
Coolant
Leve¡
Sensor
1
1992-1998
1
Left
front
of
enginecompartment,
radiator
coolant
reservoir
Engine
Coolant
Temperature
1992-1998
I
Left
front
of
engine
under
intake
manifold
I
Fig
.
19
.
Sensor
Fig
.
20
.
Evaporative
Emission
Valve
1992-1998
Left
side
strut
Power
area
Evaporator
Temperature
Sensor
1992-1998
Left
side
of
heater
box
EWS
II
Control
Module
1/1995
-
1998
Behind
glove
compartment
Fig
.
8
.
Fig
.
9
.
EWS
II
Ring
Antenna
1
1/1995
-
1998
1
At
ignition
cylinder
EWS
II
Transmitter
Module
1/1995
-
1998
Right
side
of
steering
column
in
auxiliaryrelay
panel
Fig
.
3
.
Exhaust
Gas
Flap
Valve
1996-1998
Left
rear
muffler
area
Flasher
Relay
1992-1998
Power
distribution
box
Fig
.
2
.
Foglight
Relay
1
1992-1998
1
Power
distribution
box
1
Fig
.
2
.
Fresh
Air
FlapActuator
1
1992
1
Right
side
of
heater
box
Fresh
Air
FlapActuator
1
1993-1995
1
Below
right
side
heater
box
Fresh
Air
FlapActuator
1
1996-1998
Below
left
side
heater
box
Fuel
Injectors
1992
-
1998
Top
left
side
of
engine
Fuel
Leve¡
Sensor,
Left
1
1992-1998
/
Under
left
side
of
rear
seat
infuel
tank
Fuel
Leve¡
Sensor,
Right
1
1992-1998
1
Under
right
side
of
rear
seat
in
fuel
tank
1
Fig
.
28
.
Fuel
Pump
1
1992-1998
1
Under
right
side
of
rear
seat
in
fuel
tank
1
Fig
.
28
.
Fuel
Pump
Relay
1
1992-1998
1
Power
distribution
box
1
Fig
.
2
.
Fuel
Pump/Start
Identification
Relay
1994
-
1996
Power
distribution
box
Fuel
Tank
Pressure
Sensor
1
1997-1998
1
Right
rear
wheel
well
behind
trim
liner
ELECTRICAL
COMPONENT
LOCATIONS
610-13
Fuse
andRelay
x(Power
11992-1998
I
Left
side
of
engine
compartment
I
Fig
.
2
.
Distribution
Box
Fig
.
7
Fig
.
10
.
Gas
Filler
LockMotor
1992-1998
Right
side
of
luggage
compartment
Gear
Position/Neutral
Safety
Switch
1992-1998
Next
to
gear
shift
lever
in
center
console
Fig
.
29
.
(Automatic
Transmission
Range
Switch)
Glove
Compartment
Lock
Motor
1994-1998
Behind
glove
compartment
Grounds
G
100
1995-1998
Front
of
left
front
fender
(headlights)
Fig
.
22
.
G
101
1992-1998
Front
of
right
front
fender
Continued
COMPONENT
LOCATIONS
Page 401 of 759
Component
Model
Year
Location
Refer
to
Heater
Recirculation
Flap
Actuator
1992-1998
Below
left
dash
right
side
of
steering
column
HeaterBlowerMotor
Resistor
Pack
1992-1998
Behind
center
of
dashboard
Heater
Regulator
FlapActuator
1997-1998
Right
side
of
heater
box
HeaterValve
Assembly
1992-1998
Left
rear
engine
compartment
HeatingNentilation
Relay
Box
1992-1993
Below
left
side
of
dash
HeatingNentilation
Relay
1994-1998
Left
front
footwell
High
Speed
Cooling
Fan
Relay
1992-1998
Power
distribution
box
Fig
.
2
.
Homs,
Right/Left
1993-1998
Front
of
engine
compartment
Horn
Relay
1992-1998
Power
distribution
box
Fig
.
2
.
Horn
Relay
(Alpine)
1994-1998
Behind
glove
compartment
Fig
.
8
.
Board
Computer/Anti-Theft
Fig
.
9
.
Idle
Speed
Control
Valve
1992-1995
Top
rearof
enginebehind
intake
manifold
(M42
engine)
Fig
.
11
.
Idle
Speed
Control
Valve
1992-1995
Top
left
side
of
engine
(M50
engine)
Idle
Speed
Control
Valve
1993-1996
Below
intake
manifold
(M50/S50US
engine)
Idle
Speed
Control
Valve
1996-1998
On
throttle
housing
(M44
engine)
Fig
.
15
.
Idle
Speed
Control
Valve
1997-1998
Left
front
of
engine
below
intake
manifold
(M52/S52US
engine)
Ignition
Coils
1992-1998
Right
of
engineunder
plastic
cover
(four-cylinder)
Fig
.
7
.
Ignition
Cofs
1992-1998
Top
of
engine
undercover
(six-cylinder)
Fig
.
17
.
Ignition
Switch
1992-1998
Right
sídeofsteering
column
Intake
Air
Resonance
Changeover
1992-1998
Leftrear
of
engine
compartment
Valve(DISA)
Intake
Air
Temperature
Sensor
1992-1995
In
mass
air
flow
sensor
(M42
engine)
Intake
Air
TemperatureSensor
1996-1998
In
top
ofair
filter
housing
(M44
engine)
Fig
.
12
.
Intake
Air
Temperature
Sensor
1992-1998
I
Left
sídeof
engine
in
intake
manifold
(six-cylinder)
-
-
I
Fig
.
13
.
Fig
.
14
.
Kick-Down
Switch
(A/T)
1
1992-1998
1
Left
footwell
Mixing
Actuators
1
1992-1998
1
Heater
box
ELECTRICAL
COMPONENT
LOCATIONS
610-15
Table
a
.
E36
Component
Locations
Knock
Sensors
1
1992-1998
1
Left
side
of
engine
block
Left
Front
Power
Window
Motor
11992-1998
/
Left
front
door
Left
Front
Window
Monitoring
Switch
1
1997-1998
1
Left
front
door
trim
panel
Left
Front
Window
Retraction
Switch
1
1992
-
1993
1
Left
front
door
handle
lock
assembly
Left
Splice
Panel
1
1992-1998
1
Under
left
side
of
dash
at
kick-panel
1
Fig
.
5
.
Main
Fuse
and
Relay
Box
(Power
1992-1998
I
Left
sideof
engine
compartment
Fig
.
2
.
Distribution
Box)
1
I
Mass
Air
Flow
Sensor
1992-1998
I
Left
side
of
engine,
intake
air
duct
Fig
.
7
.1
I
Fig
.
15
.
Continued
COMPONENT
LOCATIONS
Page 429 of 759
612
Switches
and
Electrical
Accessories
GENERAL
.
.
.
.
.
.
.
.
.
...
.
.
.
.
.
...
.
......
.612-1
Headlight
switch,
replacing
..
.
...
.
.
.
.
.
.
.
.
.
612-5
Foglight
switch,
replacing
....
.
.
.
.
.
.
.
.
.
.
.
.
.
612-5
INTERIOR
SWITCHES
.
.
...
.
.
.
.
.
.
.
.....
612-1
Hazard
warning
switch,
replacing
.
.
.
.
.
.
.
.
.
.612-5
Turn
signal
switch
and
wiper
switch,
Powerwindow
switch,
replacing
.
.
.
...
.
.
.
.
.
612-5
replacing
.
.
.
.
.
.
.
...
.
.
.
.....
.
....
.
.
.
.
612-1
Outside
mirrorswitch,
replacing
.
.
.
.
.....
.
.
.612-6
Ignition
Switch
Assembly
.
.
.
.
.
.
.
.
....
.
...
612-3
Ignition
electrical
switch,
replacing
.
...
.
....
612-3
INTERIOR
LIGHTS
.
.
................
.
..
612-6
Ignition
lock
cylinder,
replacing
.
.
.
.
.....
.
..
612-4
Dome
light,
rear
map
lights,
trunk
light,
Headlight
and
Foglight
Switch
Assembly
.
.
.
.
612-5
replacing
bulbs
.
......
.
.
.
.
.
.
.
.
.
.....
.
.612-7
GENERAL
Turn
signal
switch
and
wiper
switch,
replacing
Thissection
covers
replacement
of
interior
switches
and
accessories
.
The
procedures
for
removing
the
turn
signal
stalk
switch
and
the
wiper
system
stalk
switchare
similar
.
When
working
on
electrical
switches,
always
disconnect
the
negative
(-)
cable
from
the
battery
and
insulate
the
cable
end
to
prevent
accidental
re-connection
.
CAUTION-
Prior
to
disconnectiog
the
battery,
read
the
battery
disconnection
cautions
given
at
the
front
of
this
manual
on
page
viii
.
WARNING
-
The
cars
covered
by
this
manual
are
equipped
with
a
Supplemental
Restraint
System
(SRS)
that
auto-'
matically
deploys
one
or
more
airbags
.
Each
airbag
unit
houses
an
explosive
powerful
charge
.
Any
work
involving
the
SRS
system
should
only
be
per-
formed
byan
authorized
BMW
dealer
.
Making
re-
pairs
without
the
proper
knowledge
and
special
test
equipment
may
cause
serious
personal
injury
.
See
721
Airbag
System
(SRS)
3
.
With
front
wheels
pointed
straight
ahead,
remove
steer-
"
Testing
and
replacement
information
for
the
oil
ores-
¡ng
wheel
.
See
320
Steering
and
Wheel
Alignment
.
sure
switch
is
covered
in
119
Lubrication
System
.
NOTE-
"
Wirfng
diagramscan
be
found
in
Electrical
Wiring
Diagrams
.
"
Fuse,
relay
and
electrical
component
locations
can
be
found
in
610
Electrical
Component
Locations
.
"
Replacement
information
for
thetransmission
gear
position/neutral
safety
switch
is
covered
in
250
Gear-
shift
Unkage
.
INTERIOR
SWITCHES
NOTE
-
To
preventmarring
interior
trim,
wrap
the
tips
of
screw-
drivers
and
pliers
with
tape
beforeprying
out
switches
or
electrical
accessories
.
SWITCHES
AND
ELECTRICAL
ACCESSORIES
612-1
1
.
Disconnect
negative
(-)
cable
from
battery
and
cover
terminal
with
insulating
material
.
2
.
Remove
airbag
unit
from
steering
wheel
.
See
721
Air-
bag
System
(SRS)
.
Store
airbag
unit
in
a
safe
placew¡th
pad
facing
up
.
NOTE
-
To
helo
with
reassembly,
mark
steering
wheel
and
col-
umn
before
disassembly
.
4
.
Remove
trim
panel
from
lower
left
side
of
instrument
panel
.
See513
Interior
Trim
.
INTERIOR
SWITCHES