Page 181
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Electric heating for the rearwindow 241
Components
475
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113
116
207
Saab 900
Page 182
242 _ Electric heating for the rear window, Convertible, US, CA, JP, ME, FE, AU
Electric heating for the rear window, Convertible
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Saab 900
Page 183
Electric heating for the rear window, Convertible, US, CA, JP, ME, FE, AU 243
Operation
The electric heating of the rear window can be
switched on and off by means of switch 116. For a
complete description of the wiring for the lighting of
the switch on cars for the US, CA and JP markets, see
also the section entitled "Lighting for controls, US,
CA, JP”.
The switch is supplied from fuse 13, via 29-pole red
connector 152B (when the ignition switch is in the
drive position).
When the switch is depressed, terminal E of relay
113 and thus also the relay will be energised. Elec-
tric heater 115 for the rear window will then be sup-
plied from fuse 29, via the relay contacts.
The relay coil is earthed (terminal 85) via mercury
switch 279 which is open when the top is down and is
closed when the top is up. The relay is thus always
de-energised when the top is down.
Time-delay relay
On the following markets, relay 113 has been re-
placed by a time-delay relay and spring-loaded
switch 116.
U.S.A., Canada, Japan, Middle East, Far East and
Australia.
After the switch has been depressed and the relay
has been energised, the time circuit in the relay will
be supplied (terminal 15) from fuse 22. After around
10 minutes, the relay will switch off the supply to the
electric heating for the rear window. If the switch is
depressed when the heating is on, the relay will trip.
When the electric heating for the rear window is
switched on, warning lamp 47J will be supplied from
terminal E of the relay.
If the ignition is switched off while the electric heat-
ing for the rear window is switched on, the supply to
terminal 15 will be opened, and the relay will immedi-
ately trip the supply to the heating element for the
rear window.
US and CA markets (1988 model)
The time-delay relay also controls the heating of the
rear-view mirrors.
Fault-tracing hints
The electric heating for the rear window will be oper-
ative when the ignition switch is in the drive position.
1. Check fuses 13, 22 and 29 and check that the
supply to them is live.
2. Check that the supply to the switch and terminal
30 of the relay is live.
3. Check the relay: Press the switch and check that
the supply to the electric heating for the rear
window is live.
4. Check that the mercury switch closes the circuit
when the top is raised.
5. Check the connectors, cable harnesses and
earth connections.
Saab 900
Page 184
244 Electric heating for the rear window, Convertible, US, CA, JP, ME, FE, AU
Locations of components
3
17
22A
47J
48
59
60
143
115
116
152A
152B
159
207
279
Earthing point in the facia
Extra rheostat for the lighting of switches
and controls
Fuse holder
in the electrical distribution box, in the en-
gine compartment, on the left-hand wheel
housing
Rear window heater warning lamp
in the combined instrument on the instru-
ment panel
Cigarette lighter
on the facia
2-pole connector
one in the electrical distribution box in the
engine compartment, on the left-hand
wheel housing
one on the inside of the top, on the left-hand
side
Single-pole connector
in the luggage compartment, at the left-
hand lid hinge, behind the trim
Relay for the electrically heated rear window
in the electrical distribution box in the en-
gine compartment, on the left-hand wheel
housing
Electric heater for the rear window
Switch for the electrically heated rear win-
dow
in the centre of the facia
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
Distribution terminal +15
in the electrical distribution box, in the en-
gine compartment, on the left-hand wheel
housing
Electrically-heated rear-view mirrors
one on each front door
Mercury switch for the electrically heated
rear window
on the top mounting on the left-hand side,
inside the top
Saab 900
Page 185
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Electric heating for the rear window, Convertible, US, CA, JP, ME, FE, AU
245
Components
M 1987-88
47J
113
219
Saab 900
Page 186
246
Electric window regulators
Electric window regulators
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Page 187
Electric window regulators 247
Operation
Ail window regulators in the car can be operated by
means of switches in the centre console between the
front seats. Under certain circumstances, the win-
dow regulator in each of the rear doors can also be
operated by means of a switch in the corresponding
door.
The supply is taken from fuse 11, via 29-pole white
connector 152A, to the following switches on the
centre console:
© Switch 189, for switching in and out the window
regulators in the rear doors
© To switches 162 (driver’s door), 163 (co-driver’s
door), 190 (left-hand rear door) and 191 (right-
hand rear door)
If switch 189 is closed, the rear window regulators
can also be operated from switches 190A in the
left-hand rear door and 191A in the right-hand rear
door.
If switch 189 is open, the switches in the rear doors
will be inoperative. The window regulators in the rear
doors can then only be operated by means of the
switches on the centre console. To open the window,
press the window symbol on the button.
As an example, if switch 190 (for the left-hand rear
door) on the centre console is depressed, one of the
two pairs of contacts (depending on whether the
window is to be raised or lowered) will close. Current
will then flow to switch 190A in the left-hand rear
door, through the switch and to regulator motor 193.
It then flows through the second pair of contacts of
the switch, back to the switch on the centre console
and to earth (117).
For a complete description of the wiring for the light-
ing of the switches on cars for the US, CA and JP
markets, see also the section entitled "Lighting for
controls, US, CA, JP”.
The connectors (59) marked SE, Fl, EU, GB, ME, FE
and AU in the diagram are used for adjusting the
operation of the system to suit RHD or LHD cars,
Automatic window regulator controls
Unlike the other switches, driver's door switch 162
has two positions for lowering the window. This
switch is also connected to time-delay relay 287.
Position 1: The window travels downwards as long as
the switch is kept depressed in this position.
Apositive voltage is supplied to motor 164 across pin
2 on the switch and across the relay contacts. The
motor will stop when the switch is released.
Position 2: The window opens fully even if the switch
is released after a brief instant.
The coil of relay 287 is now supplied with a positive
voltage across pin 5 of the switch, and the relay is
energised. The motor is supplied across the closed
relay contacts (pin 15). The supply is maintained (for
approx. 6 seconds) by the time-delay function of the
relay until the window has been lowered fully, even if
the switch is released immediately. (The downward
travel of the window may be interrupted by setting the
switch to position 3, "Raise”.)
Position 3: The window will travel upwards as long as
the switch is held depressed in this position. The
motor is supplied across pin 7 on the switch and the
direction of rotation is reversed, causing the window
to be raised.
Fault-tracing hints
The electric window regulators will be operative when
the ignition switch is in the drive position.
1. Check fuse 11 and check that the supply to it is
live.
2. Check that terminal 7 of switch 189 and termi-
nals 3 and 6 of the other switches in the centre
console are live. (On 162, terminal 3 only.)
If the window regulators in the rear doors cannot
be operated from the corresponding switches in
the rear doors, check that current flows from
switch 189 to terminals 3 and 6 of these
switches as well.
3. Check the switches by measuring at their termi-
nals,
4. Check the connectors, cable harnesses and
earth connections.
Automatic window regulator controls
Check the automatic window regulator controls as
follows: Set switch 162 to position 2 and check that
the supply to pin 4 on the relay is live. Pin 1 should be
earthed. Check that pin 3 and pin 15 on the relay are
live.
Saab 900
+H
Page 188
248
Electric window regulators
Locations of components
17 Extra rheostat for the lighting of switches
and controls
22A Fuse holder
in the electrical distribution box, in the en-
gine compartment, on the left-hand wheel
housing
57 3-pole connector
one behind the trim, at the corresponding B
pillar
58 12-pole connector
on the angle bracket, under the facia to the
left of the steering column
59 2-pole connector
one in the engine compartment, at the up-
per hinge of the left-hand front door, behind
the electrical distribution box
one in the engine compartment, at the up-
per hinge of the right-hand front door
two under the centre console, between the
front seats
60 Single-pole connector
one under the centre console, between the
front seats
one behind the trim, at the corresponding B
pillar
117 Earthing point
at the handbrake (1987)
between the ignition switch and the hand-
brake (1988)
152A 29-pole white connector
in the electrical distribution box in the en-
gine compartment, on the left-hand whee!
housing. The connector is accessible from
the interior of the car
152B 29-pole red connector
in the engine compartment, in the electrical
distribution box on the left-hand wheel
housing. The connector is accessible from
the interior of the car.
162 Switch for driver's door electric window
regulator
between the front seats, on the centre con-
sole
163 Switch for co-driver's door electric window
regulator
between the front seats, on the centre con-
sole
164 Motor for left-hand front electric window
regulator
in the left-hand front door
165
189
190
190A
191
191A
193
194
287
Motor for right-hand front electric window
regulator
in the right-hand front door
Switch for the rear-door electric window
regulators
between the front seats, on the centre con-
sole
Switch for left-hand rear electric window
regulator
between the front seats, on the centre con-
sole
Switch for left-hand rear electric window
regulator
in the left-hand rear door
Switch for right-hand rear electric window
regulator
between the front seats, on the centre con-
sole
Switch for right-hand rear electric window
regulator
in the right-hand rear door
Motor for left-hand rear electric window
regulator
in the left-hand rear door
Motor for right-hand rear electric window
regulator
in the right-hand rear door
Relay for automatic contro! of window regu-
lators
under the back seat, on the left-hand side
Saab 900
Page 189
Electric window regulators
249
Components
162
163
189
190
191
164,165,193,194
287
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lagi
Saab 900
Page 190
250
Electric window regulators, Convertible
Electric window regulators, Convertible
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