Page 111
166 Luggage compartment illumination
Luggage compartment illumination
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Saab 900
Page 112
: Luggage compartment illumination 167
Operation
The supply to luggage compartment lamp 55 is taken
from fuse 28 and then on to switch 56. When the
luggage compartment lid is opened, the switch will
close the circuit to earth and the lamp will light up.
The luggage compartment illumination can be
switched off manually by means of the switch in the
lamp fitting.
Convertible
On the Saab 900 Convertible, the luggage compart-
ment lamp is switched on and off by means of a
mercury switch (56) which closes the supply circuit
when the lid is opened.
Fault-tracing hints
1. Check fuse 28 and check that the supply to it is
live.
2. Check the bulb and check that the supply to it is
live.
3. Check the switch.
4. Check the connectors, cable harnesses and
earth connections.
Saab 900
|
H
{
Page 113
Y
168 Luggage compartment illumination
Locations of components
22A Fuse holder
in the electrical distribution box, in the en-
gine compartment, on the left-hand wheel
housing
52 Ignition switch lighting
between the front seats, under the centre
console
LoS: Luggage compartment lamp
in the luggage compartment, on the left-
hand side
56 Luggage compartment light switch
3-D, 5-D: in the luggage compartment, at
the tailgate striker plate.
2-D, 4-D: in the luggage compartment, for-
ward of the left hinge of the luggage com-
partment lid.
Convertible: in the luggage compartment lid
(mercury switch)
59 2-pole connector
in the luggage compartment, on the left-
hand side
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 114
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he left-
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Luggage compartment illumination
169
Components
55
56(conv)
56
Saab 900
Page 115
170 _— Extra fog lamps
Extra fog lamps
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Saab 900
Page 116
£1
Extra fog lamps
Operation
Extra fog lamps are fitted only to cars for certain
markets.
The fog lamps are wired so that they can be switched
on only when the parking lights or dipped beams are
on.
When light switch 10 is in position 1 (parking lights)
or 2 (full beam/dipped beam), the switch for the extra
fog lamps (88) is supplied via 29-pole red connector
152B and fuse 10 (also for the parking lights on the
right-hand side of the car).
When the switch is depressed, relay 107 will be
energised, since its coil will be earthed via the fila-
ments for left-hand and right-hand full beams 11,
and via full beam warning lamp 47G. The lamp in the
switch will then light up with full brightness.
Both extra fog lamps 85 then receive a positive sup-
ply across fuse 21, via the relay contacts, which are
closed.
When the full beams are switched on, the relay will be
de-energised, and the fog lamps will be switched off,
even if the switch is depressed. This is due to the fact
that a positive voltage is then being supplied to both
sides of the relay coil.
Fault-tracing hints
The extra fog lamps can be switched on by setting
light switch 10 to position 1 or 2, while switch 88 is
depressed.
1. Check fuses 10 and 21 and check that the sup-
ply to them is tive.
2. Check full beam filaments 11 and full beam
warning lamp 47G.
3. Check each fog lamp and check that the supply
to it is live. Check the earthing at the lamp.
4. Check fuse 15. If the fuse has blown, the fog
lamps will not be extinguished when the full
beams are switched on.
5. Check relay 107, light switch 10 and switch 88,
by measuring at the terminals.
6. Check the relevant cable harness and earth con-
nections.
Saab 900
Page 117
Extra fog lamps
Locations of components
3
t
10
11
HET
22A
47G
85
88
107
152B
152C
Earthing point in the facia
Earthing point, radiator cross-member
Light switch
on the left-hand side of the facia
Full beam filament
in the left-hand headlamp
Extra rheostat for the lighting of switches
and controls
on the facia
Fuse holder
in the electrical distribution box, in the en-
gine compartment, on the left-hand wheel
housing
Full beam warning lamp
in the combined instrument in the instru-
ment panel
Extra fog lamps
under the front bumper
Switch for extra fog lamps
on the facia
Relay for extra fog lamps
on cars with 8-valve engine: in the engine
compartment, in the Lambda relay box, for-
ward of the left-hand wheel housing
on cars with 16-valve engine: in the electri-
cal distribution box on the left-hand front
wheel housing
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.
Saab 900
Page 118
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Extra fog lamps
173
Components
85
88
Page 119
174 Windscreen wipers
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Windscreen wipers
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Saab 900
Page 120
Windscreen wipers 175
Operation
The windscreen wipers of the car can run at two
speeds and have an intermittent operation function.
The system also includes the windscreen washers.
When the ignition switch is in the drive position,
@ Windscreen wiper stalk switch 61 and
@ Relay 83 for intermittent operation of the wind-
screen wipers
are supplied via fuse 5 and 29-pole red connector
152B.
When the switch is in position II (low speed), terminal
53 of the wiper motor is supplied from terminal 53 of
the switch, and the motor will run at low speed.
When the switch is in position Ill, terminal 53B of the
wiper motor is supplied from terminal 53B of the
switch. The motor will now run at high speed.
When the switch is in position | (intermittent oper-
ation), current will flow from terminal INT to intermit-
tent operation relay 83, which will thus be energised.
The relay contacts will close, and current will flow
from terminal 53M to terminal 31B of the switch,
through the switch and from terminal 53 of the switch
to terminal 53 of the wiper motor. The wiper motor
will now run intermittently. The frequency of the in-
termittent operation of the wiper motor is determined
by the relay.
The wiper motor incorporates a mechanically ac-
tuated switch, to which the supply is live regardless
of the position of the stalk switch. The switch con-
trols the supply so that the wiper motor unit will
always return to the parked position after the circuit
has been opened by the stalk switch.
This is due to the fact that the wiper motor is then
supplied from terminal 53A, and from terminal 31B,
across the built-in switch. The current flows through
the intermittent operation relay and the stalk switch,
and then back to terminal 53 of the windscreen wiper
motor.
When the wiper motor unit reaches the parked posi-
tion, the mechanically actuated switch will open and
the motor will stop.
Windscreen washers
Washing will start when the stalk switch is moved
towards the steering wheel rim, regardless of
whether switch 61 is in position |, I! or Ill.
When the stalk switch is moved towards the steering
wheel, contacts "A" will close. Washer motor 63 is
then supplied from terminal 54 of the stalk switch
and will run as long as the switch remains closed.
After the stalk switch has been released, the wipers
will sweep the windscreen five times before they
stop.
Fault-tracing hints
The windscreen wipers will be operative when the
ignition switch is in the drive position.
4. Check fuse 5 and check that the supply to it is
live.
2. Check that motor 62, switch 61 and relay 83 are
live.
3. Operate the switch and check that the wind-
screen wiper motor and the washer motor are
live.
4. Check the connectors, cable harnesses and
earth connections.
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