Power Supply (+15 Circuit)

��+Power Supply (+15 Circuits):

WIRING DIAGRAM

DESCRIPTION OF OPERATION
Positive current is supplied from battery 1 to ignition switch 20. When the ignition switch is the Drive or Start position, current is supplied from ignition switch terminal 15 to crimped connection J19 and from there to:
^ Lights switch 10
^ Speed sensor 132.
^ Speed warning control module 355.
^ Main fuse box 22a (behind the glove box access flap), fuses 1, 4 and 13.
Current is then supplied via fuse 13 to distribution terminal 159 and on to the following components:
^ Main instrument display panel 47
^ Clock 49
^ Relay for seat-belt/ignition key warning 82
^ Relay for fuel pump 102
^ Relay for electrically heated rear window 113
^ Time-delay relay for delayed interior lighting 151
^ Relay for A/C compressor 156
^ EDU trip computer 210
^ Pictogram 213
^ Filament monitor 228a
^ SCC trip computer 241
^ Control module for anti-theft alarm 289
^ Relay for secondary air injection pump 324
^ Connection for mobile telephone relay 375
^ Relay for EXH warning 416
^ Saab Trionic control module 430
^ Relay for disengagement of radiator fan 433
^ Saab Trionic test socket 444 (for works use only)
^ TTS control module 507
^ Motronic 2.8.1 control module 510
^ V6 ignition coil unit 552
^ Relay for heat plates 553
^ Control module for anti-theft alarm with immobilizer 583
^ Motronic M5.2 control module 587
^ Saab Trionic OBDII control module 589

FAULT DIAGNOSIS HINTS
1. Check the battery voltage.
2. Check the connections on distribution block 75 and the +15 terminal block (159).
3. Turn the ignition switch to the Drive position and check that current flows through fuse 13.
4. Check the relevant wiring harness.