Page 121
176 Windscreen wipers
Locations of components
3
7
22A
23
61
62
63
83
1528
152¢
158
269
Earthing point in the facia
Earthing point, radiator cross-member
Fuse holder
in the electrical distribution box, in the en-
gine compartment, on the left-hand wheel
housing
Flasher relay
under the facia on the left-hand side, be-
hind the knee shield
Windscreen wiper stalk switch
on the right-hand side of the steering co-
lumn
Windscreen wiper motor
in the engine compartment, on the bulk-
head
Washer motor
in the washer fluid container, forward of the
right-hand wheel housing
Relay for intermittent Operation of the wind-
screen wipers
under the facia, to the left of the steering
column (behind the knee shield)
29-pole red connector
29-pole black connector
in the electrical distribution box in the en-
gine compartment, on the left-hand wheel
housing. The connectors are accessible
from the interior of the car.
Negative distribution terminal
in the electrical distribution box in the en-
gine compartment, on the left-hand wheel
housing
Two-pole connector (ME and FE only)
Saab 900
Page 122
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Windscreen wipers 177
Components
62
Page 123
178 Headlamp wipers
Headlamp wipers
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Saab 900
Page 124
Headlamp wipers 179
Operation
Headlamp wipers are available on certain markets
only.
When the ignition switch is in the drive position,
current will flow:
@ from fuse 5, via 29-pole red connector 152B, to
switch 61 for the headlamp wipers and washer,
and
© from fuse 8 to each headlamp wiper motor 66.
When the stalk switch is moved towards the steering
wheel rim, contacts ”A” will close. Headlamp wiper
motors 66 and and washer motor 63 will start simul-
taneously.
When the stalk is released and the circuit is opened,
the wiper motors will still be energised (across fuse
8). When the wiper motors have completed five
strokes, the limit switches incorporated into the mo-
tors will open the circuit and the wipers will stop in
the parked position.
A diode in each motor prevents the current from the
feedback circuit of the motor from flowing back to the
washer motor.
Each wiper motor incorporates overload protection
with a protective switch which is actuated by a resis-
tor. The switch is in series with the motor and will trip
if the load should exceed a predetermined value (e.g.
if the wiper blades have frozen to the lenses).
Fault-tracing hints
The headlamp wipers and the washer motor will be
operative when the ignition switch is in the drive
position.
1. Check fuses 5 and 8 and check that the supply
to them is live.
2. Check that terminal 53A of the switch is live, and
that the supply is reaching the wiper motors.
3. Move the stalk switch towards the steering
wheel rim and check that the wiper motors and
the washer motor are live.
4. Check the connectors, cable harnesses and
earth connections.
Saab 900
Page 125
180 Headlamp wipers
Locations of components
ii Earthing point, radiator cross-member
22A Fuse holder
in the electrical distribution box, in the en-
gine compartment, on the left-hand wheel
housing
or 3-pole connector
one at each wiper motor, at the front of the
engine compartment.
61 Windscreen wiper stalk switch
on the right-hand side of the steering co-
lumn
63 Washer motor
in the washer fluid container, forward of the
right-hand wheel housing
66 Headlamp wiper motor
on the left-hand and right-hand sides of the
grille
83 Relay for intermittent operation of the wind-
screen wipers
under the facia, to the left of the steering
column (behind the knee shield)
152B 29-pole red connector
152C 29-pole black connector
in the electrical distribution box in the en-
i gine compartment, on the left-hand wheel
housing. The connectors are accessible
i | ‘ from the interior of the car.
Saab 900
Page 126
; . Headlamp wipers 181
Components
3
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61 63 66 83
Saab 900
Page 127
182
117A RD 1.5
117
RD 1.5
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152A
5B GR 4.0 5GR 4.0 A,7 oR 25055] 7 oR 25
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5H 10 20
GR 1.5 VT 6.0 152A
12 GR/VT 0.75 bead 12 GR/VT 1.0. ]54
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(Ik 22 Fa \ 421
87] 85
13
SV 0.5
177158
11H
VT 2.5
117 1178
RD 1.5 VT 0.5
30, 86
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87]_85 152B
T8, T8A
118 SV 0.5 b 2
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352 x ex 1X
Saab 900
Page 128
a i i |
Horn 183
Operation
The horn system includes two tuned loud-tone horns,
one of them high-pitched and the other low-pitched.
When the ignition switch is in the drive position, a
positive voltage (+54) is taken via the actuating coil
in horn relay 68 and slip ring switch 352 to the horn
switch on the steering wheel.
When one of the horn switches is closed, the relay
will be energised and horn 40 will be supplied via
fuse 26 and the relay contacts.
Fault-tracing hints
The horn will be operative when the ignition switch is
in the drive position.
1. Check fuse 26 and check that the supply to it is
live.
2. Check the relay by earthing relay terminal 85.
The horn should then sound.
3. Check the cable harnesses and earth connec-
tions.
Saab 900
Page 129
ea 184 Horn
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i
Locations of components
1
20
21
22A
40
41
68
TS
152A
152B
158
211
352
Battery
on the right-hand side of the engine com-
partment
Earthing point, radiator cross-member
Ignition switch
on the centre console between the front
seats
Ignition switch relay
in the electrical distribution box, in the en-
gine compartment, on the left-hand wheel
housing
Fuse holder
in the electrical distribution box, in the en-
gine compartment, on the left-hand wheel
housing
Horn
two on the right-hand side, behind the head-
lamp
Horn switch
behind the steering wheel hub pad
Horn relay
in the electrical distribution box in the en-
gine compartment, on the left-hand wheel
housing
Distribution block
in the engine compartment, on the right-
hand side
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 interior of the car.
Negative distribution terminal
in the electrical distribution box in the en-
gine compartment, on the left-hand wheel
housing
Earthing point on the gearbox
Slip ring switch
at the steering column
Saab 900
Page 130
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Horn 185
Components
40
41
[A 1
75
Saab 900