Page 301
Lighting relay
The lighting relay contains devices for flashing the high
beam and switching between high beam and low beam.
Function (see wiring diagram):
If the ignition switch (4) and the light switch (5) are on,
current will pass through relay coil (1). The coil contact
is pulled down and connects either high or low beam via
contact (3). Contact (3) can change position as it is me-
op eee eer eae A
ae 31 S QF
chanically influenced by the contact at relay coil (2).
This coil is connected with the headlight dimmer and
flasher switch (10) (i.e. the same lever as the direction
indicator switch). If either the ignition switch or the
light switch — or both — are switched off, the high beam
signal can be used. The contact at coil (1) is then in the
upper position and the high beam is connected through
the contact at coil (2), which is grounded through the
light switch,
6 7
WIRING DIAGRAM, LIGHTING RELAY
. 2. Relay coils
3. Contact
4, Ignition switch
5. Light switch
6, Low beam
7. High beam
8. Fuses
9.
10.
. High beam indicator light
|. Headlight dimmer and flasher switch
Jan. 1972 SAAB 364-3
Page 302
Exchanging the oil pressure switch
Removing
1. Pull off the connecting wire.
2. Unscrew the oil pressure switch (width across flats
7/16").
Installing
NOTE
Coat the threads with sealant compound before in-
stalling.
. Screw in the oil pressure switch and tighten to 12—
15 Nm (9—11 ft.lb., 1.2—1.5 kpm) torque.
. Connect the wire
1
2
¥
OIL PRESSURE SWITCH, 1.7 AND 1.85 L ENGINES
On 2.0 | engine, the oil pressure switch is located on the
left side of the cylinder block, underneath the water pump.
Exchanging the temperature gauge transmitter
Removing
1. Drain the radiator and engine coolant system.
2. Pull off the connecting wire.
3. Unscrew the transmitter (width across flats 1/2’).
Installing
NOTE
Coat the threads with sealant compound before in-
stalling
. Screw in the transmitter.
. Connect the wire.
. Fill the system with coolant.
. Warm up the engine and check the temperature trans-
mitter deflection.
5. Check the coolant level and top off if necessary.
PWN
TEMPERATURE GAUGE TRANSMITTER
Warning system for unfastened seat belt, model 1974
A warning lamp on the instrument panel lights up if the
driver and/or the front seat passenger has not fastened
his seat belt.
The following components are included in the warning
system:
Warning lamp — in the middle of the panel
Seat contact — in the passenger seat
Handbrake contact (manual transmission)
Gear selector lever contact (automatic transmission)
Belt contact — in the flap lock
The lamp lights up in the following cases:
If the ignition is on, the handbrake (on cars with manual
transmission) is released or the gear selector lever (on
cars with automatic transmission) is moved from the “P”
position and:
a. the driver has not fastened his seat belt
b, the front seat passenger actuates the seat contact
but has not fastened his seat belt.
364—4 SAAB Dec. 1975
Page 303
O
Warning system for unfastened seat belt on 1972—1973
models (USA versions)
A buzzer and a warning lamp go on if the driver and/or
the front seat passenger has not fastened his seat belt.
The following components are included in the warning
system:
Buzzer — under the instrument panel
Warning lamp — on the instrument panel
Seat contact — in the passenger seat
Handbrake contact — (manual transmission)
Gear selector lever contact — (automatic transmission)
Retractor contacts — in the front seat retractor reels
The buzzer sounds and the warning lamp lights up in the
following cases:
If the ignition is on, the handbrake (on cars with manual
transmission) is released or the gear selector lever (on
cars with automatic transmission) is moved from the “P”
position and:
a, the driver has not fastened his seat belt
b. the front seat passenger actuates the seat contact
but has not fastened his seat belt.
Model 1974
A device which prevents the engine from starting and a
buzzer and a warning lamp are actuated if the driver and/or
the front seat passenger has not fastened his safety belt.
The following components are included in the warning
system:
Buzzer — under the instrument panel
Warning lamp — on the instrument panel
Start inhibitor relay — next to the fuse box in the en-
gine compartment
Seat contact ~ in the driver's seat
Seat contact — in the passenger's seat
Belt contact ~ in the flap lock
Handbrake contact — (manual transmission)
Logic unit — under the rear seat cushion
The warning system is controlled through a logic unit
to which all the components in the system are connect-
ed. The control circuit to the starter motor is broken
when the driver or front seat passenger actuates his
seat contact but has not fastened his seat belt. As soon
as the belt is fastened, the starter motor is reconnected.
The signals to the logic unit from the seat contact and
the belt contact must be received in the right order.
This prevents tampering with the system.
The buzzer sounds and the warning lamp lights up if
the ignition is on and:
a. (manual transmission) the handbrake is released
b. (automatic transmission) the gear selector lever is
moved from the “’P”’ position
and the driver or the front seat passenger actuates his
seat contact without having fastened his seat belt.
Ba
5
WIRING DIAGRAM, WARNING SYSTEM FOR UNFASTENED SEAT BELT MODEL 1974
10, Light switch
20, Ignition switch
57. 3-pin connector
58. 8-pin connector
59. 2-pin connector
60. 1-pin connector
68. Handbrake contact
69. Seat contact
70. Belt contact, L,H,
Dec. 1975
71, Belt contact. R.H.
72. Warning light, belt warning system
80, Buzzer, key and belt warning
81, Seat contact
82, Logic unit
89, Start inhibitor relay
107, Key contact
108, 2-pin door contact
112, Electronic flasher unit
Page 304
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Page 305
GA
WIRING AND FUSES
Wiring
The wiring conducts current from the battery or alternator
to the various items of electrical equipment. To protect
the wiring and reduce the risk of short circuits, the wires
have been grouped wherever possible in cable networks, i.e.
a number of independently insulated wires surrounded by
an outer plastic sheath.
The wiring networks are divided into two groups, one at
the dash panel and in the engine compartment, and the
other leading to the rear end of the car, The connections
of the wiring are illustrated in the wiring diagram; it
should not be too difficult to remove or install wires if
this diagram is used as a guide. The wires in a cable net-
work are color coded.
The wires terminate in solderless AMP connectors. Check
that wiring is properly connected to avoid undue poten-
tial drop. The insulation of the cable network should be
tested if fuses blow frequently and damage to the insula-
tion is suspected. Note that a fuse will not blow if a short
occurs between it and the source of current. When in-
stalling new wiring, always take special care to make sure
that the size of wire chosen can handle the current load
for which it is intended, and that the wiring is well pro-
tected from wear and damage at points where it Passes
through steel partitions or is held by clamps.
Dec, 1975
Fuses
To protect wiring, etc. against abnormally heavy current
loads, e.g. in the event of a short circuit, and to reduce
the fire hazard if this should occur, the electrical system
is provided with twelve 8-amp fuses grouped in a fuse
box on the left wheel housing in the engine compartment.
One of the fuses is intended for extra equipment. All parts
of the system are fused except the headlights and the ig-
nition system. A label by the fuse box shows which fuses
protect which circuits.
In addition to these fuses as from model 1971 there is a
3-amp fuse for the headlight wiper system, placed in a
separate holder (see illustration).
IMPORTANT
As 3-amp and 8-amp fuses are the same length, there
is a risk that they may be confused. The wiper mo-
tor is liable to be damaged if an 8-amp fuse is fitted
by mistake.
NOTE
Always check when putting in a new fuse that it
makes proper contact. If a break in any circuit is
suspected, check the fuse contacts first. If the test
is made with a voltmeter, the maximum permitted
potential drop is 0.1 V.
FUSE BOX AND FUSE HOLDER FOR HEADLIGHT WIPER
SYSTEM AS FROM MODEL 1971
371-1
Page 306
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371-6