Wiring Diagram SEAT LEON 2004 - Simos control unit - brake light switch - brake pedal switch

| D | Ignition/starter switch |
| F | Brake light switch |
| F63 | Brake pedal switch |
| J59 | X contact relief relay |
| J361 | Simos control unit |
| S5 | Fuse in fuse box/relay plate |
| S13 | Fuse in fuse box/relay plate |
| S176 | Fuse -4- (30), in fuse box/battery |
| T10e | 10-pin connector, black, in protective housing for connectors, on left in plenum chamber |
| 500 | Screw connection -1- (30), on relay plate |
| 501 | Screw connection -2- (30), on relay plate |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A20 | Connection (15a), in dash panel wiring harness |
| W1 | Positive (+) connection (54), in rear wiring harness |
Wiring Diagram SEAT LEON 2004 - Simos control unit - cruise control system switch - cruise control system (CCS) button (Set) - clutch pedal switch
| E45 | Cruise control system switch |
| E227 | Cruise control system (CCS) button (Set) |
| F36 | Clutch pedal switch |
| J361 | Simos control unit |
| T4nc | 4-pin connector, on accelerator pedal |
| T10d | 10-pin connector, green, in protective housing for connectors, on left in plenum chamber |
| T10e | 10-pin connector, black, in protective housing for connectors, on left in plenum chamber |
| T10s | 10-pin connector, next to steering column right |
Wiring Diagram SEAT LEON 2004 - Simos control unit - throttle valve control unit - idling switch - throttle valve potentiometer - throttle valve positioner potentiometer
| F60 | Idling switch |
| G40 | Hall sender |
| G69 | Throttle valve potentiometer |
| G88 | Throttle valve positioner potentiometer |
| J338 | Throttle valve control unit |
| J361 | Simos control unit |
| V60 | Throttle valve positioner |
| 220 | Earth connection (sender earth), in engine wiring harness |
| D101 | Connection -1-, in engine compartment wiring harness |
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