Electrical System: Saab 900 89-90 Contents: Introduction .................................................... 4 Safety instructions ........................................ 4 Wiring diagrams ........................................... 4 Cable codes ................................................ 5 Abbreviations .............................................. 5 Using the wiring diagram ............................. 6 Using the wiring diagram ............................. 7 Using a universal instrument for fault-tracing ....................................... 8-9 Connectors ........................................... 10-11 Power supply Positive supply ............................................ 12 Electrical distribution box ............................. 12 Relays ........................................................... 13 Fuses ............................................................. 14 Extra electrical distribution box (Convertible) .................................................15 Ignition switch and positive supplies .......... 16-17 Distribution terminal +30 ............................... 18 Distribution terminal +X ................................. 20 Distribution terminal +15 ............................... 22 Distribution terminal +54 ............................... 24 Earth connections ........................................... 27 Earthing point 3, fascia .................................. 28 Earthing point 7, radiator cross-member ..... 30 Earthing point 9, luggage compartment ...... 32 Earthing point 65, back seat and earthing point 300, brake unit (1990 model) ............... 34 Earthing point 93, amplifier and earthing point 300, brake unit (1989 model) ............... 36 Earthing point 117, between the ignition switch and the handbrake lever .................... 38 Negative distribution terminal 158, in the electrical distribution box ..................... 40 Earthing point 201, engine ............................ 42 Engine electronics Starting system ............................................................................44 Fuel system, carburettor engine .................................................48 Cl fuel system: 18 1990 model, 1989 model - ME, FE Cl: T8 1989 model - Fl, EU, GB ................................. 52 Cl fuel system: 18 Lambda - SE, EU. 1990 model - Fl, GB .................................................................. 56 Cl fuel system: 1989 model T8 Lambda - EU ....................... 58 LH 2.2 fuel system: 116 - Fl, EU, GB, ME, FE ...................... 64 LH 2.2 fuel system: 1989 model T16 - Fl, EU, GB, ME, FE ................................................................... 66 LH 2.4 fuel system: T16 Lambda - US, CA, AU 1989 model - SE, EU, JP. 1:16 Lambda - US, CA, AU, JP, SE, EU ......................................................................... 72 CU14 fuel system ..................................................................... 78 Ignition system (with tachometer) C8, 18, 18 Lambda, T16, T16 Lambda 1989 model of T8, T8 Lambda .......................................................................... 84 EZK ignition system (with tachometer), 1989 model ................................................................................ 88 EZK ignition system (with tachometer), 1990 model ................................................................................ 90 Battery-charging system ........................................................... 94 APC system .............................................................................. 98 Lighting systems Headlamps .................................................................................102 Dim dipped beam - GB 1989 model .....................................106 Daylight driving lights - CA ........................................................110 Extra fog lamps ..........................................................................114 Parking lights ................................................................................118 Brake lights, 1989 model ...........................................................122 Brake lights, 1990 model............................................................124 Reversing lights ...........................................................................128 Rear fog I ights, 1989 model .....................................................132 Rear fog I ights, 1990 model .....................................................134 Direction indicators, hazard warning lights - SE, Fl, EU, GB, ME, FE, AU .....................................................138 Direction indicators, hazard warning lights - US, CA and 1989 JP .................................................................142 Lighting for controls - SE, Fl, EU, GB, ME, FE, AU and 1990 JP ...................................................146 Lighting for controls - US, CA and 1989 for JP . .....................150 Interior lighting ..............................................................................154 Interior lighting - Convertible ......................................................158 compartment illumination ............................................................162 Luggage compartment illumination ............................................164 Windscreen and headiamp wipers Windscreen wipers .................................................168 Headlamp wipers ...................................................172 Instruments and warning systems Horn ...................................................................................176 Seat-belt warning lamp ...................................................180 Seat-belt and ignition key warning .................................184 Combined instrument .....................................................188 Coolant temperature warning buzzer ............................198 Cigarette lighter ................................................................200 Heating and ventilation systems Cooling system fan, 1989 models ................................202 Cooling system fan, 1990 models ................................204 Ventilation fan ...................................................................208 Air Conditioner (AC) with time-delay relay ...................212 Air Conditioner (AC) (CU14) .........................................214 Electrically heated front seats ..........................................218 Electrically heated front seats with rheostat control for the driver's seat ...............................................222 Electric heating for the rear window .................................226 Electric heating for the rear window, Convertible ..........230 Other systems Electric window regulators ...............................................234 Electric window regulators, Convertible ........................238 Electrically operated rear-view mirrors ...........................242 Electrically operated sunroof ...........................................246 Electrically operated Convertible top ............................250 Central locking ..................................................................254 Central locking -Convertible ...........................................258 Cruise Control system ....................................................262 Anti-lock brake system (ABS) .......................................268 Power supply, hydraulic pressure and monitoring functions .........................................................272 Passive seat belts, 1989 model ...................................278 Airbag ...............................................................................284 Accessories Headlamp beam adjustment .........................................288 Radio installation ..............................................................292 Radio installation - US, CA ............................................294 Burglar alarm - US, CA and 1989 for JP ......................298 Burglar alarm, 1989 model Convertible .......................302 Burglar alarm, 1990 model Convertible .......................304 List of components Component in numerical order ......................................308