Page 251
Wiring Diagrams, Fuses and Relays
Table b. 1987 and 1988 Fuse positions-main
fuse/relay panel
Table a. 1985 and 1986 Fuse positions-main
fuse/relay panel
Position
~----
Rating
Position
Function
-----1--------------
- ~-- - - - - -
------------
Rating
Function
- - - - - - - - - -
spare
~are
1
----------------
-
':--- -110 A_~:~:I:P i~_di~t~r =-:~_--=
2
30 A
3
30 A
i
5
15 A
I
-----~~--+------------
direction indicators, tachometer (1986
models), alternator warning light (1986
~-~J-:: ~-- ~:;~or;~~ruise~control=~-=-
rear windows (convertible) (1987
models)
~=~~-A-=I~~~~>_~di~~i~r~--=~__ ~~~--
4
--------
15 A
-~-------~-~-
rear windows (convertible) (1988
models)
I,
brake fluid warning, wipers, seatbelt
warning, exhaust warning (where
applicable)
7
30 A
6
--------I----~-
7
-
----- -._------
--------
- - - -
direction indicators, tachometer,
alternator warning light
- -------
- - -
10 A
8
------
Air conditioner (A/C)
15 A
- -
brake fluid warning, wipers, seatbelt
warning, exhaust warning
-
10 A
APC system (turbo models)
30 A
power windows, sunroof
9
30 A
blower fan
- - - - . ' .. - - -
glovebox
11
-
heated seats, time-delay for interior
lights
15 A
12
-------+----- - - - - - - - - - - - - - - -
I---------f------
13
15 A
15 A
-~-
I
22--;0 A-i
:~~;~~~u:; ~:~~ ~~~~;;;~ke
:~J10A J::;:~~:~9_-_i
radiator fan
26
25 A
horn
27
15 A
hazard warning lights
28
29
i
------
30
-
--------------
_
- - - - - -
15 A
interior lighting, clock, radio, power
antenna
20 A
heated rear window
------------
20 A
15A -~
--------------------
fuel pump
Ii9ht;---------
3111S--A---I--b-ra-k-e
i right high-be;"'- ----
15 A
- - - -
-------------
left high beam, high beam warning light
- - - - - - - - ----
~_~
18
-I:
10 A
--------
19
22
--- - - ----- - - - - - 1 - - - - - - - - - - -
--------
14
~e~~?:::m
_
right front park and right rear light,
license plate light
---
10 A
:~-----i
- ---~---------- - - -
warning light, tachometer (1985
models), alternator warning light (1985
30 A
------------------_.'._-_.---------
I backup lights, cigarette lighter
20 A
- - -
---------
left front park and left rear light, burglar
j alann (where applicable)
;:: -- ~:;~~~~~:n~ ~~hts
-----------._--
radio, front cornering lights
---- - - - - 1 - - - - -
- - - --
13
alarm (where applicable)
-_.---------
25
------
-
::~:~,'~r~~~nds,t:t::::,:~g~~ b~~glar-
15 A
15 A
------
15
license plate light, glovebox and
-j-_10_A
---------
I heated seats, time-delay for interior
20 A
---~
r~:- =j~- ~~~~rk-~~d ri9h~i9hIS'21
--
right low beam
I
----------
--------------r---~--------.--'I
left high beam, high beam warning
r------- --------------------
16
- --
- -
__. _ - - - - - - - -
power windows, sunroof
lights
-
right high beam
15 A
.. _,,_.
30 A
--
1--- -------1---- - - -
15
---
- -
12
backup lights, cigarette lighter
20 A
14
--
11
---f--~--~-----
_
20
--------
-
---~
--------
1_9
-
power mirrors, cruise control
- - - -
10
371-3
---------
~--------
--110 A
j
i
-------
23
fuel system, ignition system,
.
temperature ga
... u.ge, handbrake
warning light
------------
-
-
----------------
spare
::--l~--~:;i~r-----
~~~
- - - - - - --------
u
_ _
=
----.~------
::-t:::· -:::~~~:~~~~~Ir::, :dl~'
power-=
antenna
--~--
29
-
-~
-
j 20 A
--~-~-
~-
-
- - -
heated rear window
- - -
-------1---------------------------
-~-----
---------
~--I~:- ':ur:~~~~;s---~-- ---~-~-
Page 252
371-4
Wiring Diagrams, Fuses and Relays
Table c. 1989 and 1990 Fuse positions-main
fuse/relay panel
Position
Rating
I
Table d. 1991-1993 Fuse positions-main
fuse/relay panel
Function
Position
lambda sensor pre heater
1
rear windows (convertible)
2
Rating
Function
10 A
lambda sensor preheater
I
1
!
10 A
30 A
2
3
I
I
I
30 A
I
15 A
ignition system
15 A
3
! ignition system, EGR modulating valve
I
4
I
20 A
daytime driving lights (Canada only)
5
I
15 A
wipers, seatbelt reminder lamp
6
I
30 A
Air conditioner (A/C)
7
i
15 A
I
I
8
10 A
power mirrors, cruise control
9
30 A
blower fan
10
10 A
(Califomia only)
I
direction indicators, tachometer,
waming lights for altemator, check
I engine, oil pressure, and SRS airbag
(1990 models)
i
rear windows (convertible)
I
APC system, ABS (where applicable)
4
20 A
daytime driving lights (Canada only)
5
15 A
wipers, seatbelt reminder light
6
30 A
Air conditioner (A/C)
7
15 A
direction indicators, tachometer,
waming lights for altemator, check
engine, oil pressure and SRS airbag,
shift-up indicator
8
10 A
headlight wipers, power mirrors, cruise
control, EZK test connector
9
30 A
blower fan
power windows, sunroof
10
10 A
APC system
heated seats, time-delay for interior
lights, convertible top actuation,
seatbelt warning buzzer
11
-
spare
12
-
spare
13
20 A
backup lights, cigarette lighter
14
15 A
right high beam
15
15 A
left high beam, high beam waming light
16
15 A
right low beam
17
15 A
left low beam
18
10 A
right front park, side marker lights right
rear lights, license plate light
19
10 A
left front park, sidemarker lights, left
rear lights
20
15 A
comering lights
15 A
extra fog lights
22
10 A
fuel system, temperature gauge, fuel
level gauge, speed sensor (cruise
control), waming lights for handbrake,
ABS and footbrake
23
10 A
lighting for controls and glovebox
24
-
spare
25
30 A
radiator fan
26
25 A
hom
27
15A
hazard warning lights
28
15 A
clock
29
-
spare
30
20 A
fuel pump
31
15 A
brake lights, ABS
I
11
30 A
12
20 A
I
I
-
I
13
20 A
backup lights, cigarette lighter, passive
seatbelts (1989 models)
14
15 A
right high beam
15
15 A
left high beam, high beam waming light
16
15 A
right low beam
17
15 A
left low beam
18
10 A
right front park, sidemarker lights, right
rear lights, license plate light
19
10 A
left front park, sidemarker lights, left
rear lights, burglar alarm (ex.
convertible models)
I
I
I
20
I
15 A
I
I
21
~
i
i
15 A
I
10 A
I
I
22
I
I
i
i
fuel system, temperature gauge, fuel
level gauge, speed sensor (cruise
control), waming lights for handbrake,
ABS and footbrake
10 A
lighting for controls and glovebox
24
10 A
central locking, burglar alarm
25
30 A
radiator fan
26
25 A
hom
27
15 A
hazard warning lights
15 A
interior lighting, clock, radio, antenna,
luggage compartment light
29
20 A
heated rear window
30
20 A
fuel pump
31
15 A
brake lights, ABS (1990 models)
I
I
I
extra fog lights
23
28
21
radio, comering lights, burglar alarm
(ex. 1989 sedan models)
-
I
Page 253
Wiring Diagrams, Fuses and Relays
Main Relay Positions
The relays are electromagnetic switches that operate on
low current to switch a high-current circuit on and off. Many of
the relays are mounted on the main fuse/relay panel in the engine compartment (see in Fig. 1), although later models are
equipped with additional auxiliary relay panels. Table e
through Table 9 list the relay positions in the main fuse/relay
panel.
CAUTION
• Relays positions are subject to change and can vary from
car to car, depending on options and new equipment installed.
If questions arise, consult the appropriate wiring diagrams.
Please remember that an authorized Saab dealer is the best
source for the most accurate and up-to-date information.
• Most relays incorporate several different electrical functions.
Although another relay may plug into the same panel position,
do not interchange relays.
371-5
Table g. 1989-1993 Relay positions-main
fuse/relay panel
Position
AlB
Function
I
C
I
headlights
heated rear window (1989-1990)
D
extra fog lights
E
ignition switch
F
daytime driving lights (Canada only)
G
radiator cooling fan
H
AlC compressor
J
AlC radiator fan
K
hom
-~
Additional Fuse and Relay Locations
Several other fuse and relay locations are used depending
on model year and equipment.
Table e. 1985 Relay positions-main
fuse/relay panel
Position
Function
AlB
headlights
C
heated rear window
D
AlC compressor
E
ignition switch
F
-
G
-
H
-
J
AlC radiator fan
K
hom
Table 1. 1986-1988 Relay positions-main
fuse/relay panel
I
headlights
C
heated rear window
D
ignition pulse amplifier (1986-1987
models)
E
ignition switch
F
shift up indicator
f - - - ..
G
Fuse, ABS
(30A)
Fuse pump
(30A)
292
System relay
Pump relay
Function
Position
AlB
On 1989 models, the ABS relay panel is located in the engine compartment on the driver's side wheel housing. On
1990 and later models, the ABS relay panel is located in the
engine compartment on the passenger side wheel housing by
the door hinge. Fig. 3 shows the fuse/relay panel used for ABS
functions.
B7468
Fig. 3. ABS fuse/relay panel located in engine compartment.
On models with motorized passive seat belts, the fuses and
relays for the seatbelt system are located under the rear seat
on the driver side.
extra fog lights
_.
H
AlC compressor
J
AlC radiator fan
K
hom
-
On 1989 and 1990 convertible models and all 1991 and later models, an extra fuse/relay panel (component 401 A) can
be found under the rear seat. See Fig. 4. Table h gives a list of
fuse and relay functions for this fuse/relay panel.
Page 254
371-6
Wiring Diagrams, Fuses and Relays
NOTE
On some convertible models, there are in-line fuses located in
the engine compartment for raising and lowering the convertible top. These fuses are on the passenger side bulkhead near
the exhaust manifold.
Components, Connectors and Ground
Locations
10 r::==J 8c::=:=J 6 r::==J 4 c::=:=J 2 c::=:=J
9 r::==J 7c::=:=J 5 c=J 3r::==J 1c::::=J
_ _ _ _ _ _ _ _ _ 87469
Fig. 4.
J
Extra fuse/relay panel under rear seat used on 1989 and
1990 convertible and all 1991 and later models.
All of the components, connectors, and ground locations
are uniquely numbered throughout the wiring diagrams. Each
number corresponds to a specific component, connector, or
ground point. As a general rule, the first page of each wiring
topic contains a complete list of component, connector, and
ground locations.
NOTE
A complete listing of component, connector, and ground locations can also be found at the end of this repair group. This
master list is presented twice; first in a numerical order and
then alphabetically.
NOTE
Always check the panel cover for correct fuse ratings and relay functions. The fuses are numbered 1 through 10. The relays are lettered A through F.
Ground points are an important part of the electrical system. There are only a small number of main ground locations
used throughout the car. See Fig. 5.
Table h. Fuse/relay panel under rear seat
Position
Rating
1
20 A
2
20 A
All 1991 and later models
1989·1990 Convertibles
convertible top
f-
heated seats, interior lighting, seatbelt and key
warning
I
3
25 A
heated rear window, power mirrors
4
10 A (15 A 1992
convertible)
interior lighting, burglar alarm, central locking on
convertible
5
120A
f---------+
6
20 A
--
[
radio, burglar alarm
power antenna
!
f----
7
30 A
power windows (front)
8
30 A
power windows (rear), sunroof
9
30 A
power seats (driver's side)
10
30 A
power seats (passenger's side)
--
A~-t
B----~~-.
relay for power windows (convertible models)
relay for interior lighting time delay
-
___ _ _ ~J
D
I E
-
1-------
F
I
-,~,--_._-----
1i
relay for heated rear window
----
f----
C
relay for seatbelt warning
1-----
l
--
relay for raising convertible top
relay for raising convertible top
relay for lowering convertible top
relay for lowering convertible top
relay for seatbelt warning
relay for interior lighting time delay
relay for burglar alarm
relay for ignition switch
-
Page 255
Wiring Diagrams, Fuses and Relays
371-7
-
1985·1990
Key Position
I
Ci rcuit closed
between ...
Lock
30-X
30-15
30-54
30-50
30-S+
Park
Run
Start
- -
1991 and later
87471
Fig. 6. Ignition switch terminals and terminal distribution.
87470
Fig. 5. Main chassis ground distribution.
Ignition Switch and Positive Supply
With the exception of the battery charging system, all electrical power is routed from the ignition switch or the battery
through the main fuse/relay panel.
Battery voltage supplied directly to components is designated terminal 30 in the wiring diagrams. This supply is always
live. All switched battery voltage is supplied via ignition switch
terminals 15, 50, X and 54, depending on the position of the
ignition key. Additionally, as long as the key is in the ignition
switch, terminal S of the switch will be live to the warning relay.
See Fig. 6.
WIRING DIAGRAMS
The following wiring diagrams have been specially designed to enable quick and efficient diagnosis and troubleshooting of electrical malfunctions. Each wiring sub-system or
topic, such as Ignition System, or Power Mirrors, is described
individually. Most sub-systems include a brief circuit operation
description, fault tracing, a list of component, connector and
ground locations, and the wiring diagram(s).
NOTE
Many of the wiring diagrams are applicable to cars delivered
to other world markets served by Saab. At times, there may be
certain parts of the diagram that are applicable only to these
markets. This manual covers only Saab cars delivered to the
United States (US), California (UC), and Canada (CA). Abbreviations other than US, UC, and CA found on a particular
diagram should be ignored. For example the abbreviation
"ME" is for cars sold in the Middle East.
Page 256
371-8
Wiring Diagrams, Fuses and Relays
Anti-lock Braking System (ABS)
Operation
The Anti-lock Braking System or ABS is controlled and
monitored electrically. For information on the mechanical
components of the braking system see 5 BRAKES.
A sensor at each wheel supplies the ABS control unit with
information on the wheel rotation speed. If any of the wheels
should begin to lock, the control unit will adjust the braking
pressure to the wheel(s). ABS braking on the front wheels is
individually controlled, whereas on the rear wheels it is controlled jointly.
A hydraulic pump (component 297) controls the servo action of the brakes. The hydraulic fluid pressure is controlled at
the required value by means of a pressure switch (component
294) which controls the pump motor.
The ANTI-LOCK and the BRAKE FLUID warning lamps in
the instrument cluster monitor the system. The ANTI-LOCK
warning lamp will light up if a problem or fault occurs in the
Anti-lock Braking System. The BRAKE FLUID warning lamp
will light up if the brake fluid level in the reservoir falls too low.
WARNING
If either the ANTI-LOCK or the BRAKE FLUID waming lamp
should come on, the car must not be driven. Brake failure may
occur. Have the problem corrected promptly by an authorized
Saab dealer.
Fault Tracing
The following fault tracing should be used as a guide only.
Comprehensive fault tracing is best carried out using special
ABS test equipment available through an authorized Saab
dealer.
ASS component
Test value
wheel sensors
800 to 1400 ohms
wheel sensors
at least 0.1 VAC
with wheel rotating
at 1 revolution per
second
master valve
2 to 5 ohms
measure between
terminals 1 and 2
at master valve
(295) on hydraulic
unit
inlet valves
5 to 7 ohms
measure inletvalve
coil resistances
(IFL, IFR, IR) at
ABS valve block
(296)
outlet valves
3 to 5 ohms
measure outlet
valve coil
resistances (OFL,
OFR, OR) at ABS
valve block (296)
brake fluid level
sensor
10 ohms at
contacts 1 and 2
contacts closed,
float at bottom
brake fluid level
sensor
1 ohm at contacts 3
and 4
contacts closed,
float at top
Component Locations
20
21A
22A
29
47F
470
47T
158
291
291
292
292
1. Check the fuses. The control unit (component 291), the
system relay (component 292), and the pump relay
(component 293) are all protected by fuses. These fuses are located in the ABS electrical distribution box
(component 302).
2. Test the components shown in the table using a DMM
(digital mUlti-meter). Use the wiring diagram(s) for terminal identification.
Comments
293
293
294
295
296
297
298A
298S
298C
298D
299
302
302
302A
302A
303S
303S
397
ignition switch in center console
Ignrtion swrtch relay, in relay panel
main fuse/relay panel in left wheel housing
brake light switch at brake pedal
brake waming light in instrument cluster
ASS warning lamp in instrument cluster
SRS airbag warning lamp in instrument cluster. See SRS warnings
negative distribution in main fuse/relay panel
ASS control unit (1989) at ASS distribution box, engine compartment
left wheel housing
ASS control unrt (1990 and later), under rear seat, right side
ASS system relay (1989) in ASS distribution box, engine compartment
left wheel housing
ASS system relay (1990 and later) in ASS distribution box, behind right
wheel housing
ASS pump relay (1989) at ASS distribution box, left wheel housing
ASS pump relay (1990 and later) in ASS distribution box, behind right
wheel housing
ASS pressure swrtch on the ASS hydraulic unrt
ASS master valve on the hydraulic unrt
ASS valve block in front of left wheel housing
ASS hydraulic pump motor in engine compartment at hydraUlic unit
ASS wheel sensor in left front wheel
ASS wheel sensor in right front wheel
ASS wheel sensor in left rear wheel
ASS wheel sensor in right rear wheel
ASS brake fluid level sensor in brake fluid reservoir
ASS electrical distribution box (1989) engine compartment, left wheel
housing
ASS electrical distribution box (1990 and later) behind right wheel
housing
ASS fuse holder (1989) engine compartment, left wheel housing
ASS fuse holder (1990-and later) behind right wheel housing
ASS diode (1989) engine compartment, left wheel housing
ASS diode (1990 and later) behind right wheel housing
ASS diagnostic 2-pin test socket near the hydraulic unrt (in wiring harness)
Page 257
Wiring Diagrams, Fuses and Relays
371-9
Anti-lock Braking System (ABS)
Connector Locations
1989-1990 models
57
57
58
59
59
59
59
60
98
98
123
123
123
152A
152B
152C
3-pin connector in right front wheel sensor
3-pin connector in leM front wheel sensor
12-pin connector behind instrument panel, to leM of steering column
2-pin connector at the main fuselrelay panel (22)
2-pin connector under rear seat (1990 models)
2-pin connector at the ABS hydraulic unit in engine compartment
2-pin connector in engine compartment at right side of the bulkhead
partition
1-pin connector in main fuse/relay panel (1990 models)
10-pin connector at the ABS control unit
1a-pin connector behind the instrument panel to the left of the steering
column
4-pin connector (2) at the ABS control unit
4-pin connector (black) left wheel sensor
4-pin connector (gray) right wheel sensor
29-pin bulkhead connector in main fuse/relay panel
29-pin bulkhead connector in main fuse/relay panel
29-pin bulkhead connector in main fuse/relay panel
1991and later
H2-12
H2-22
H2-23
H2-24
H2-25
2-pin connector under rear seat, left side
2-pin connector in engine compartment near ABS hydraulic unit
2-pin connector in engine compartment right side partition
2-pin connector under rear seat, left side
2-pin connector under rear seat, right side
H2-27 2-pin connector in main fuse/relay panel
H3-4 3-pin connector in main fuse/relay panel
H29-1 29-pin bulkhead connector behind main fuse/relay panel (1991-1991 1/2)
H29-3 29-pin bulkhead connector behind main fuse/relay panel (1991-1991 1/2)
H33-1 33-pin bulkhead connector behind main fuse/relay panel
(19911/2 and later)
H33·3 33-pin bulkhead connector behind main fuse/relay panel
(1991 1/2 and later)
Ground Locations
1990
3
65
93
211
257
300
ground point behind instrument panel
ground point at the handbrake
ground point at left wheel housing
ground point at gearbox
ground point at alternator bracket
ABS ground point at the front of the hydraUlic unit
1991 and later
G1
G5
G8
G12
G16
G25
ground point at radiator cross member
ground point under rear seat
ground point behind instrument panel
ground point at left wheel housing
ground point in front of the ABS hydraulic unit
ground point on gearbox
I «([)) I
An
I
47F
29
295
300
~
291
47Q
293
~~~
-.,
\-"::;:-
I
I::l
292
29~9:.;r
.. ~
..'.~..:,. .
....
BRAKE
fLUID
~
',,'j
296
2988
298C
2980
302
401
~
21A
~
Page 258
371-10
Wiring Diagrams, Fuses and Relays
Anti-lock Braking System (ABS)
1989-1990
75
152A
'-------"--"-"---'-'''------<:>--'--=-=<----1>29
7 GR 2.0
10
VT 6.0
20
182A
YlO.5
r----e----nr
I
I
I
I
I
L
I I
I I
1~~·~pE. I I
BRAKE US,CA.
I I
FLUID o\ll. I I
47F
IANTil
~
rmlS£,n,EU,
l<L _ _ 'l..
751
..J L
187
GR/VT 0.75 VT 0.5
302
259
299
7"'SLO.75
7<5
Cl 4.0
93("89J
65("90)
3038
93(.8~)
65(.90)
12
27
20 J
14
~2
291
01~02i
C
2 J 59
Page 259
Wiring Diagrams, Fuses and Relays
371-11
Anti-lock Braking System (ABS)
1991-1993 (page 1 of 2)
RD 16,0
75
J25
r--~~f---,,5-,G,,-Y_4-,0,__
_ _ _ _ _ _ _ _J
20
-----j-------
~-_.
',3
7 ·1 ~)
y(
"11
I
!<-~~-
_________
-4~_ ~_.:..i..-~?-l
4---+--+---i-T-----i---...J
794
rTT
I\Jrn
J48
m,147L.oO
r:l .74500,075
L!J-!""O-l!J-
(":5
303R
",,;
~
~
.J
l.1
"'
r
u
:~
27
20 3
8
I
... --'
G5
£
~
12
rn
74}PK075
...
--
--.-~~
10
1
26
291
II
11
15
34
257
.'i~.....
007
C
Page 260
371-12
Wiring Diagrams, Fuses and Relays
Anti-lock Braking System (ABS)
1991-1993 (page 2 of 2)
12
27
20
3
8
1
14
10
32
26
291
6 24
35
16
~
f'1
5 23
c:i
0
0::
:J
m
~~
~
" N
co
N
"'"
17
?;
33
15
34
f'
f'
~
I
I
0
~
f'
c:i
c:i
0
0
I
I
~
~I
?;
0::
0
?;
?;
0
?;
Z
w
>
m
w
0::
>
Z
0
n
'"
"
ry,
""
<b
If)
CD
m
0
~
3
~
:J
n
~
'"
5
4
3
4
~
296
IFL
32H2-24
25 7
22 4
c:i
0::
z
0
~
",n
~~
295
OFL
~'
00
18
11
IR
OR
IFR
OFR
~
H2<?5 2 '31
------------------.~'~E-D---IB-7-503~1
OISH 129
B