Power Supply (+15 Circuit)

P:�+Power Supply (+15 Circuits):

WIRING DIAGRAM

DESCRIPTION OF OPERATION
From battery 1, positive voltage is fed to ignition switch 20. When the ignition switch is in the Drive or Start position, current flows from ignition switch connection 15 to:
^ Lights switch 10
^ Speed sensor 132.
^ Speed warning control module 356
^ Main fuse box 22A fuses 1, 4 and 13.

Current is supplied from fuse 13 to distribution terminal 159 where the following components are connected:
^ 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 interior lighting 151
^ Relay for A/C compressor and radiator fan 156
^ EDU trip computer 210
^ Pictogram 213
^ Filament monitor 228A
^ SCC trip computer 241
^ Anti-theft alarm control module 289
^ Relay for secondary air injection pump 324
^ Connection for mobile telephone relay 375
^ ETS control module 376
^ Relay for EXH warning 416
^ Saab Trionic control module 430
^ Relay for disengagement of radiator fan 433
^ Saab Trionic data link connector (for production only) 444
^ TTS control module 507
^ Motronic 2.8.1 control module 510
^ Ignition coil unit V6 552

FAULT DIAGNOSIS HINTS
1. Check the battery voltage.
2. Check the connections on distribution block 75 and terminal block +15 (159).
3. Turn the ignition switch to the Drive position and check that current flows through fuses 9 and 13.
4. Check the relevant wiring harness.