saab documents

Workshop manual

Saab 900 Service Manual 3:2: Electrical System, System Diagrams, Operation and Fault-Tracing M1987–88

pages 81–90 of 238 (ocr, may contain errors)

Page 81

120

Parking lights

Locations of components

3
7
9
10

13

14

15

22A

57

59

60

93

152A
152B

234

Earthing point in the facia
Earthing point, radiator cross-member
Earthing point in the luggage compartment

Light switch
on the left-hand side of the facia

Parking lights
in the front light clusters

Rear lights

Combi Coupé: in the rear light clusters and
on the tailgate

Sedan: in the rear light clusters

Number plate illumination
on the luggage compartment lid

Fuse holder

in the electrical distribution box, in the en-
gine compartment, on the left-hand wheel
housing

3-pole connector (Combi Coupé)
in the luggage compartment, at the left-
hand air outlet

2-pole connector (Sedan)
in the luggage compartment lid

Single-pole connector (GB)

in the electrical distribution box, in the en-
gine compartment, on the left-hand wheel
housing

Earthing point, left-hand wheel housing
member

29-pole white connector

29-pole red connector

in the electrical distribution box in the en-
gine compartment, on the left-hand wheel
housing.

The connectors are accessible from the inte-
rior of the car

Side marker lights
in the front light clusters

Saab 900

Page 82

Parking lights 121

Components

10 13 234

14

Page 83

126 _— Brake lights

Brake lights

109

432D_RD 0.75

189E_SV_0.75

3-D:US,CA

132B RD 075
Lo, E
FR), |30 301
“ cc)
fo—esl
789B 189A SV 0.75
SV 0.75
132C 1890
RD 075 SV 0.75
132 132A
RD 10 RO1S
°
133 AC O75
132B_ RD 075
1324 RD1S 5 |
® ee x ®
ME, FE,
Oy) , | ae - Oy
30 1898 189A SV 9.75 “Oy 30
132A RD 15 $V 075 x
132A
RO15
1890 SV 10 1B9E SV 10
3-D, 5-D z
’
Es 1
— Sanntincieetineiniill Nace Pbaingieeinmeieentancee apace
P ze
2-D, 4-D CAB
— Seren r 1 7
US,CA US,CA
132 132 a
A, ores 132 RD 0.75 RD 10 mo 132 RD 075
ee
132 132A 109
RD 10 RO 0.75 59
se 189E_SV 0.75
Scam
1698
SV 0.75
7 sera h
OL amen ey
J
(ME_FE,AU) 269
esieataas Tat 133 RD 0.75
TUs.cale) 372 BL/RD 15
1328 RDO7S 189 SV 15
J G
efgiell): Seto
sv 10
9 4
30 30 30 30
2-D, 4-D

‘Saab 900

Page 84

€

Brake lights 127

Operation

The supply to brake light switch 29 is taken from fuse
31, via the 29-pole white connector 152A. When the
car is braked, the contacts will close and brake lamps
30 will be energised.

Depending on the market, one or two lamps (30) are
used on each side for the brake lights. When two
lamps are used, the second lamp is connected by
means of cable 132A, cable 132B or connector 269.

European market (3-D, 5-D)

Cable 132A (3-D, 5-D) is not used and connector
269 (2-D, 4-D) is not fitted. Only one lamp on each
side will light up when the brakes are applied. (The
extra lamps are used for the rear fog lights instead.)

Australian, Middle-Eastern and Far-Eastern
markets

Cable 132A (3-D, 5-D) is used and connector 269
(2-D, 4-D) is fitted, so two lamps light up on each
side of the car. °

U.S.A., Canadian and Japanese markets

On cars for these markets, cable 132A (3-D) and
cable 138B (2-D, 4-D) is used, so two lamps light up
on each side of the car.

These cars are also equipped with high-level brake
light 109 (US, CA) which is located at the bottom of
the rear window. On the 3-D model, the brake lights
are connected to the left-hand rear light fittings in
the tailgate via two single-pole connectors, and on
the 2-D and 4-D models (US, CA) via one 2-pole
connector (59).

On the Convertible, high-level brake light 109 (US,
CA) is located in the spoiler and is connected by
means of two 2-pole connectors 59. The connectors
are located at the left-hand hinge of the boot lid.

Fault-tracing hints

Ae

Check fuse 31 and check that the supply to it is
live.

Check that the supply to brake light switch 29 is
live.

Operate the brake light switch. Check the bulbs
and check that the supplies to them are live.
Check the earthing at each lamp.

Check the connectors, cable harnesses and
earth connections.

Saab 900

Page 85

128 __— Brake lights

Locations of components
9 Earthing point in the luggage compartment

15 Number plate illumination
on the luggage compartment lid

22A Fuse holder
in the electrical distribution box, in the en-
gine compartment, on the left-hand wheel
housing

29 Brake light switch
at the brake pedal

30 Brake lamps

3-D, 5-D: in the rear light clusters and, on
certain markets, in the tailgate

2-D, 4-D: in the rear light clusters

57 3-pole connector - 3-D, 5-D only
in the luggage compartment, at the left-
hand air outlet

59 2-pole connector
on the 2-D, 4-D (U.S.A., etc. only): in the
luggage compartment, on the left-hand
side, under the parcel shelf
on the Convertible: two in the luggage com-
partment at the left-hand lid hinge, behind
the trim

60 Single-pole connector - 3-D, 5-D only
“one in the luggage compartment, at the
left-hand air outlet
two in the luggage compartment, at the
left-hand rear light fitting (U.S.A., etc. only)

109 High-level brake light - U.S.A., Canada
at the bottom of the rear window (2-D, 4-D
and 3-D)
in the spoiler, on the luggage compartment
lid (Convertible)

152A 29-pole white connector
in the electrical distribution box in the en-
gine compartment on the left-hand wheel
housing. The connector is accessible from
the interior of the car.

Saab 900

Page 86

lpartment

in the en-
nd wheel

iand, on

the left-

: in the
ft-hand

se com-
behind

ily
at the

at the
>. only)

da
D, 4-D

‘tment

4

Brake lights 129

Components

Page 87

130 _ ~=— Reversing lights

Reversing lights

| US
SE: 18, T8A, 116, 116A
Fl: T8,116

1488 SV 0.5

93

138A
VT 0.75

138B VT 0.75

149B SV 0.5

|; : 138
i BL/VT 1.0

| Hs AUT

jam

| vT 25 16

|

\ | [l}> bez SS

i} 152A 31
it 135.710 | 28 4135 VT10 | ae

h
31

138 BL/VT 1.0 13,4 138 BL/VT 1.0

He
uM
me. (Z) 136 VT_1.0

137 VT_0.75
32

1890 SV 1.0 189E SV 1.0

©9e

32

3-D, 5-D ms

136_VT_1.0
137 VT 0.75

/ 189 SV 15

fefell::

32 :
2-D, 4-D

Siete

32

Saab 900

Page 88

r x

Reversing lights 131

Operation

The supply to reversing light switch 31 is taken from
fuse 13, via 29-pole white connector 152A. When
the reverse gear is engaged, the contacts will close
and reversing lamps 32 will light up.

Cars for certain markets of certain models are
equipped with side reversing lights 119, located in
the front light clusters. The side reversing lights are
supplied from the reversing light switch via connector
152A.

Fault-tracing hints

The reversing lights are switched on when reverse

gear is engaged and the ignition switch is in the drive

position.

1. Check fuse 13 and check that the supply to it is
live.

2. Check that the reversing light switch terminals
are live.

3. Check the bulbs and check that the supplies to
them are live. Check the earthing at each lamp.

4. Check the connectors. and the relevant cable
harness.

Saab 900

Page 89

ie

Reversing lights

Locations of components
ig Earthing point, radiator cross-member
9 Earthing point in the luggage compartment
22A Fuse holder
in the electrical distribution box, in the en-
gine compartment, on the left-hand wheel
housing
31 Reversing light switch
under the centre console, to the left of the
selector lever
32 Reversing lamps
in the rear light clusters
76 Switch for raising the idling speed, auto.
transm.
under the centre console, at the selector
lever
93 Earthing point, left-hand wheel housing
member
119 Side reversing lights
in the front light clusters
152A 29-pole white connector

in the electrical distribution box in the en-
gine compartment, on the left-hand wheel
housing. The connector is accessible from
the interior of the car.

Saab 900

Page 90

oer

artment

the en-
1 wheel

t of the

, auto.

slector

using

—~@

1e en-
wheel
: from

ee

Reversing lights

133

Components

32