Wiring Diagram SEAT LEON 2002 - Battery - starter motor - ignition/starter switch - discharge relay for contact X
| A | Battery |
| B | Starter motor |
| D | Ignition and starter switch |
| J59 | Discharge relay for contact X |
| S162 | Fuse -1- (30) fuse holder/battery |
| S163 | Fuse -2- (30) fuse holder/battery |
| S164 | Fuse -3- (30) fuse holder/battery |
| S176 | Fuse -4- (30) fuse holder/battery |
| S177 | Fuse -5- (30) fuse holder/battery |
| S178 | Fuse -6- (30) fuse holder/battery |
| S179 | Fuse -7- (30) fuse holder/battery |
| S180 | Fuse -8- (30) fuse holder/battery |
| T61 | 6-way connector, brown, in the connector's protective casing, plenum chamber, left |
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| 500 | Bolted joint -1- (30), on the relay plate |
| 501 | Bolted joint -2- (30), on the relay plate |
| 503 | Bolted joint -2- (75x), on the relay plate |
| A2 | Positive connection (15), instrument panel wiring harness |
| A32 | Positive connection (30), instrument panel wiring harness |
| A41 | Positive connection (50), instrument panel wiring harness |
| A49 | Connection -1-, instrument panel wiring harness |
| A80 | Connection -1- (X), instrument panel wiring harness |
Wiring Diagram SEAT LEON 2002 - Control unit with warning lamps on the instrument panel - immobiliser reading coil - belt switch- driver's side - lights switched on warning buzzer
| C | Alternator |
| D2 | Immobiliser reading coil |
| E24 | Belt switch - driver's side |
| H16 | Lights switched on warning buzzer |
| J... | Engine control units |
| J285 | Control unit with warning lamps in instrument panel |
| J362 | Immobilizer control unit |
| K2 | Alternator warning lamp |
| K19 | Seat belt warning system warning lamp |
| K63 | Warning lamp 'yellow triangle' symbol (Auto-Check-system with voice) |
| K117 | Immobilizer warning lamp |
| S5 | Fuse in fuse holder/relay plate |
| S7 | Fuse in fuse holder/relay plate |
| S11 | Fuse in fuse holder/relay plate |
| T10 | 10-way connector, orange, in the connector's protective casing, plenum chamber, left |
| T10d | 10-way connector, green, in the connector's protective casing, plenum chamber, left |
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| 81 | Earth connection -1-, instrument panel wiring harness |
| A2 | Positive connection (15), instrument panel wiring harness |
| A121 | Connection (High-Bus), instrument panel wiring harness |
| A122 | Connection (Low-Bus), instrument panel wiring harness |
| B163 | Positive connection -1- (15), interior wiring harness |
Wiring Diagram SEAT LEON 2002 - Control unit with warning lamps on the instrument panel - rev. counter - trailer operation warning lamp - reserve fuel level warning lamp - oil level/temperature sender
| G5 | Rev. counter |
| G22 | Speedometer sender |
| G266 | Oil level/temperature sender |
| J... | Engine control units |
| J255 | Climatronic control unit |
| J285 | Control unit with warning lamps on the instrument panel |
| K18 | Trailer operation warning lamp |
| K105 | Reserve fuel warning lamp |
| L75 | Digital display illumination |
| S22 | Fuse in relay plate fuse holder |
| S223 | Fuse in fuse holder |
| Y4 | Odometer |
| T10 | 10-way connector, orange, in the connector's protective casing, plenum chamber, left |
| T12d | 12-way connector, in the climatronic unit |
| T14a | 14-way connector, in the cable channel, left |
| A27 | Connection (speed signal), in the instrument panel wiring harness |
| A43 | Connection (57L), instrument panel wiring harness |
| A44 | Connection (57r), instrument panel wiring harness |
| A84 | Connection (58L), instrument panel wiring harness |
| A85 | Connection (58R), instrument panel wiring harness |
| * | Only vehicles with WIV |
| ** | Only in the Toledo |
| --- | Only in the León |
Wiring Diagram SEAT LEON 2002 - Control unit with display in dash panel insert - main beam warning lamp - rear fog light warning lamp - left turn signal warning lamp - digital clock
| G21 | Speedometer |
| J285 | Control unit with display in dash panel insert |
| J393 | Convenience system central control unit |
| K1 | Main beam warning lamp |
| K13 | Rear fog light warning lamp |
| K65 | Left turn signal warning lamp |
| K94 | Right turn signal warning lamp |
| Y2 | Digital clock |
| T23 | 23-pin connector, under steering wheel |
| T32 | 32-pin connector, blue, on dash panel insert |
| 135 | Earth connection -2-, in dash panel wiring harness |
| A5 | Positive (+) connection (right turn signal), in dash panel wiring harness |
| A6 | Positive (+) connection (left turn signal), in dash panel wiring harness |
| A13 | Connection (door contact switch), in dash panel wiring harness |
| A51 | Connection (56), in dash panel wiring harness |
| A88 | Connection (rear fog light), in dash panel wiring harness |
Wiring Diagram SEAT LEON 2002 - Control unit with warning lamps on instrument panel - multi-function display call-up button - multi-function display memory switch - hand-brake control switch
| E86 | Multi-function display call-up button |
| E109 | Multi-function display memory switch |
| F9 | Handbrake control switch |
| F34 | Brake fluid level switch |
| G33 | Windscreen washer water level sender |
| J285 | Control unit with warning lamps on instrument panel |
| K4 | Side light warning lamp |
| K14 | Handbrake warning lamp |
| K37 | Windscreen washer fluid level warning lamp |
| K102 | Tailgate/boot lid closed warning lamp |
| K118 | Brake system indicator light |
| T6d | 6-way connector |
| T32 | 32-way connector, blue, instrument panel |
| T32a | 32-way connector, green, instrument panel |
| 179 | Earth connection, right hand side headlamp wiring harness |
| 269 | Earth connection (electronic earth) -1-, instrument panel wiring harness |
| A115 | Connection (hand brake control), instrument panel wiring harness |
Wiring Diagram SEAT LEON 2002 - Flasher switch - headlight dipper/flasher switch - parking light switch - twin filament bulb/sealed beam unit - left
| E2 | Flasher switch |
| E4 | Headlight dipper/flasher switch |
| E19 | Parking light switch |
| L1 | Twin filament bulb/sealed beam unit, left |
| M1 | Side light bulb, left |
| M5 | Turn signal bulb, front left |
| M18 | Side turn signal bulb, left |
| S18 | Fuse in fuse holder/relay plate |
| S19 | Fuse in fuse holder/relay plate |
| S21 | Fuse in fuse holder/relay plate |
| T8 | 8-way connector, right hand headlamp |
| T12 | 12-way connector, indicators |
| 179 | Earth connection, right hand side headlamp wiring harness |
| A5 | Positive connection (right-hand indicator) instrument panel wiring harness |
| A6 | Positive connection (left-hand indicator) instrument panel wiring harness |
| B166 | Connection (56a), interior wiring harness |
| B167 | Connection (56b), interior wiring harness |
Wiring Diagram SEAT LEON 2002 - Emergency flasher switch - flasher relay - hazard warning light system warning lamp - twin filament bulb/sealed beam unit - right
| E3 | Emergency flasher switch |
| J1 | Flasher relay |
| K6 | Hazard warning light system warning lamp |
| L2 | Twin filament bulb/sealed beam unit, right |
| M3 | Side light bulb, right |
| M7 | Flasher bulb, front right |
| M19 | Flasher bulb, right |
| S20 | Fuse in fuse holder/relay plate |
| T7 | 7-way connector, central console |
| T8a | 8-way connector, right hand headlamp |
| 179 | Earth connection, right hand side headlamp wiring harness |
| A5 | Positive connection (right hand flasher) instrument panel wiring harness |
| A6 | Positive connection (left hand flasher) instrument panel wiring harness |
| B167 | Connection (56b), interior wiring harness |
Wiring Diagram SEAT LEON 2002 - Brake light switch - cruise control system brake pedal switch (diesel direct injection system) - turn signal bulb - rear left - brake and tail light bulb - left
| F | Brake light switch |
| F47 | Cruise control system brake pedal switch (diesel direct injection system) |
| J... | Engine control units |
| M6 | Turn signal bulb, rear left |
| M21 | Brake and tail light bulb, left |
| T5d | 5-pin connector, brown, connector point left C-pillar |
| T6h | 6-pin connector, in left luggage compartment |
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| 52 | Earth connection, in tailgate/bootlid, left |
| 86 | Earth connection -1-, in rear wiring harness |
| 219 | Earth connection -2-, in tailgate/bootlid wiring harness |
| A6 | Positive (+) connection (left turn signal), in dash panel wiring harness |
| A98 | Positive (+) connection -4- (30), in dash panel wiring harness |
| B131 | Connection (54), in interior wiring harness |
| W1 | Positive (+) connection -1- (54), in rear wiring harness |
| * | Only models with diesel engine |
| ** | Only Toledo |
| --- | Only León |
Wiring Diagram SEAT LEON 2002 - Reversing light switch - reversing light bulb - left - reversing light bulb - right - high level brake light bulb
| F4 | Reversing light switch |
| M16 | Reversing light bulb, left |
| M17 | Reversing light bulb, right |
| M25 | High level brake light bulb |
| T5j | 5-pin connector, brown, in boot lid |
| T5k | 5-pin connector, in door, right |
| T5l | 5-pin connector, in flap left |
| T5m | 5-pin connector, in boot lid |
| T5n | 5-pin connector, on left luggage compartment |
| T5s | 5-pin connector |
| T10 | 10-pin connector, orange, in predective housing for connectors, in plenum chamber, left |
| 98 | Earth connection, in tailgate/bootlid wiring harness |
| 218 | Earth connection, in tailgate/bootlid wiring harness |
| A87 | Connection (RF (reversing light)), in dash panel wiring harness |
| B131 | Connection (54), in interior wiring harness |
| W3 | Connection, in rear wiring harness |
| W33 | Connection (reversing light), in tailgate/bootlid wiring harness |
| * | Only Toledo |
| --- | Only León |
Wiring Diagram SEAT LEON 2002 - Turn signal bulb - rear right - reversing light bulb - left - reversing light bulb - right - brake and tail light bulb - right
| M8 | Turn signal bulb, rear right |
| M16 | Reversing light bulb, left |
| M17 | Reversing light bulb, right |
| M22 | Brake and tail light bulb, right |
| T3j | 3-pin connector, in tailgate/bootlid, left |
| T3k | 3-pin connector, in tailgate/bootlid, right |
| T5a | 5-pin connector |
| T5c | 5-pin connector |
| T6h | 6-pin connector, on left luggage compartment |
| T6i | 6-pin connector, in right luggage compartment |
| 98 | Earth connection, in tailgate/bootlid wiring harness |
| A5 | Positive (+) connection (right turn signal), in dash panel wiring harness |
| W3 | Connection in rear wiring harness |
| W33 | Connection (reversing light), in tailgate/bootlid wiring harness |
| * | Only Toledo |
| --- | Only León |
Wiring Diagram SEAT LEON 2002 - Rear left fog lamp bulb - rear right fog lamp bulb
| L46 | Rear left fog lamp bulb |
| L47 | Rear right fog lamp bulb |
| T3j | 3-way connector, tailgate, left |
| T3k | 3-way connector, tailgate, right |
| T5a | 5-way connector |
| T5c | 5-way connector |
| T5k | 5-way connector, bonnet, right |
| T5l | 5-way connector, bonnet, left |
| T5m | 5-way connector, boot lid |
| T5n | 5-way connector, boot, left |
| T6i | 6-way connector, boot, right |
| 98 | Earth connection, in the tailgate wiring harness |
| W4 | Connection -1- (rear foglamps), rear wiring harness |
| W25 | Connection -2- (rear foglamp), rear wiring harness |
| * | Only in the Toledo |
| --- | Only in the León |
Wiring Diagram SEAT LEON 2002 - Tailgate/boot lid release switch - switch for remote fuel flap release - luggage compartment light switch - button illumination
| E165 | Tailgate/boot lid release switch |
| E204 | Switch for remote fuel flap release |
| F5 | Luggage compartment light switch |
| J393 | Convenience system central control unit |
| L76 | Button illumination |
| S270 | Fuse -12- (30), in battery fuse holder |
| V155 | Motor for fuel flap locking |
| W3 | Boot light |
| T5a | 5-way connector |
| T5m | 5-way connector, boot lid |
| T5n | 5-way connector, boot, left |
| T23 | 23-way connector, under the steering wheel |
| 98 | Earth connection, tailgate wiring harness |
| A29 | Connection (interior light), in the instrument panel wiring harness |
| R6 | Positive connection -1-, interior lighting wiring harness |
| W15 | Connection -1- (boot light), rear wiring harness |
| * | Only in the Toledo |
| --- | Only in the León |
Wiring Diagram SEAT LEON 2002 - Cigarette lighter light bulb - radio - cigarette lighter
| L28 | Cigarette lighter light bulb |
| R | Radio |
| S12 | Fuse in fuse box/relay plate |
| S13 | Fuse in fuse box/relay plate |
| S15 | Fuse in fuse box/relay plate |
| S237 | Fuse in fuse box |
| S239 | Fuse in fuse box |
| S240 | Fuse in fuse box |
| S241 | Fuse in fuse box |
| S242 | Fuse in fuse box |
| U1 | Cigarette lighter |
| T8b | 8-pin connector, on radio |
| T10d | 10-pin connector, green, in predective housing for connectors, in plenum chamber, left |
| T16 | 16-pin connector, self-diagnosis |
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| 255 | Earth connection -1-, in radio wiring harness |
| A4 | Positive (+) connection (58b), in dash panel wiring harness |
| A11 | Positive (+) connection (58b), in dash panel wiring harness |
| A21 | Connection (86s), in dash panel wiring harness |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| V22 | Positive (+) connection (30a), in navigation wiring harness |
Wiring Diagram SEAT LEON 2002 - Headlight switch - fog light switch - rear fog light switch - fog light warning lamp - headlight switch illumination
| E1 | Headlight switch |
| E7 | Fog light switch |
| E18 | Rear fog light switch |
| K17 | Fog light warning lamp |
| L9 | Headlight switch illumination |
| S236 | Fuse in fuse holder |
| T8a | 8-way connector, right hand headlamp |
| T17 | 17-way connector, headlight switch |
| * | Fog light pre-installation |
Wiring Diagram SEAT LEON 2002 - Horn activation - horn/two-tone horn - two-tone horn relay - glove compartment light - number plate light
| H | Horn activation |
| H1 | Horn/two-tone horn |
| J4 | Two-tone horn relay |
| S1 | Fuse in fuse holder/relay plate |
| S3 | Fuse in fuse holder/relay plate |
| S4 | Fuse in fuse holder/relay plate |
| W6 | Glove compartment light |
| X | Number plate light |
| T5a | 5-way connector |
| T5b | 5-way connector, beside the steering column |
| T5k | 5-way connector, bonnet, right |
| T5m | 5-way connector, boot lid |
| T3g | 5-way connector, boot, left |
| 176 | Earth connection, right hand side headlamp wiring harness |
| A37 | Connection (58a), instrument panel wiring harness |
| A61 | Positive connection (X), instrument panel wiring harness |
| A90 | Connection (2-tone horn), instrument panel wiring harness |
| W41 | Positive connection (58), number plate wiring harness |
| * | Only vehicles with twin-horn |
| ** | Only in the Toledo |
| --- | Only in the León |
Wiring Diagram SEAT LEON 2002 - Light dimmer - switches and instruments - headlight range adjuster - headlight ranger adjuster motor - left - headlight range adjuster motor - right
| E20 | Light dimmer - switches and instruments |
| E102 | Headlight range adjuster |
| V48 | Headlight range adjuster motor, left |
| V49 | Headlight range adjuster motor, right |
| T7 | 7-way connector, centre console |
| T8 | 8-way connector, left hand headlamp |
| T8a | 8-way connector, right hand headlamp |
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| 101 | Earth connection, headlamp adjuster wiring harness |
| 176 | Earth connection, right hand headlamp wiring harness |
| A103 | Connection -2- (56), instrument panel wiring harness |
| A114 | Connection (headlamp adjustment), instrument panel wiring harness |
Wiring Diagram SEAT LEON 2002 - Fresh air ventilator switch - fresh and circulating air flap switch - warning lamp for fresh and circulating air functions - oil level and temperature sender
| E9 | Fresh air ventilator switch |
| E159 | Fresh and circulating air flap switch |
| G266 | Oil level/temperature sender |
| K114 | Warning lamp for fresh and circulating air functions |
| L16 | Fresh air regulation light |
| N24 | Fresh air blower with overheating fuse series resistor |
| S2 | Fuse in fuse holder/relay plate |
| S225 | Fuse in fuse holder |
| V2 | Fresh air blower |
| V154 | Servo-motor for fresh/circulating air flap |
| T4c | 4-way connector, under the passenger's seat |
| T4n | 4 way connector, engine bay, left |
| T6n | 6-way connector |
| T81 | 8-way connector |
| T14a | 14 -way connector, cable channel, left |
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| 162 | Earth connection, ventilator motor wiring harness |
| A20 | Connection (15a), instrument panel wiring harness |
| L66 | Connection, heater blower wiring harness |
| * | Only vehicles with WIV |
Wiring Diagram SEAT LEON 2002 - Rear window heating switch - heated rear window warning lamp - rear window heating switch light - windscreen washer motor - windscreen and rear window washer pump - heated rear window
| E15 | Rear window heating switch |
| K10 | Heated rear window warning lamp |
| L39 | Rear window heating switch light |
| S224 | Fuse in fuse holder |
| S226 | Fuse in fuse holder |
| S227 | Fuse in fuse holder |
| V12 | Windscreen washer motor |
| V59 | Windscreen and rear window washer pump |
| Z1 | Heated rear window |
| T5c | 5-way connector |
| T5d | 5-way connector, brown, interconnection, strut C, left |
| T5s | 5-way connector |
| T7a | 7-way connector, central console |
| A96 | Connection (53a), instrument panel wiring harness |
| A97 | Connection (53), instrument panel wiring harness |
| A102 | Connection (windscreen washer), instrument panel wiring harness |
| W8 | Connection (15 a), rear wiring harness |
| * | Only in the Toledo |
| --- | Only in the León |
Wiring Diagram SEAT LEON 2002 - Intermittent wiper switch - intermittent wiper control - automatic intermittent wash/wipe relay-intermittent wash - windscreen wiper motor
| E22 | Intermittent wiper switch |
| E38 | Intermittent wiper control |
| J31 | Automatic intermittent wash/wipe relay-intermittent wash |
| V | Windscreen wiper motor |
| T6d | 6-way connector |
| T8c | 8-way connector |
| T18 | 18-way connector |
| A96 | Connection (53a), instrument panel wiring harness |
| A97 | Connection (53), instrument panel wiring harness |
| A102 | Connection (windscreen wiper), instrument panel wiring harness |
SEAT LEON 2002 Overview of relay
Overview of relay | | | SEAT LEON 2002 Relay on relay plate
Relay on relay plate | | 1 - | Dual tone horn relay -J4- (53) |
| 2 - | X-contact relief relay -J59- (100) |
| 4 - | Fuel pump relay -J17- (409) |
| - | Glow plug relay -J52- (103) |
| V y Vl - | Automatic intermittent wash and wipe relay -J31- |
| - | with rain sensor, with/without headlight washer system (192) |
| - | without rain sensor, with headlight washer system (389) |
| - | without rain sensor, without headlight washer system (377) |
| | SEAT LEON 2002 Relay on the 13 position additional relay carrier above the relay plate
Relay on the 13 position additional relay carrier above the relay plate | | 10 - | Fuel pump relay (turbo diesel engine unit injectors) (167) -J17- (up to October 2002) |
| - | Fuel pump relay (TDI-PD) (53) (from November 2002) |
| 11 - | Automatic gearbox relay AG4 -J60- (175) |
| 12 - | Terminal 30 voltage supply relay -J317- (109) |
| 13 - | Radiator fan relay (53) |
| | | Right-handdrive vehicles: | | 6 - | Telephone switch-over relay | | 7 - | Radiator fan relay -J26- (53) | | 8 - | Terminal 30 voltage supply relay (109) | | 9 - | Automatic gearbox relay AG4 -J60- (175) | | 10 - | Fuel pump relay (turbo diesel engine unit injectors)-J17- (167) (up to October 2002) | | - | Fuel pump relay (TDI-PD) (53) (from November 2002) | | 12 - | Cigarette lighter relay Australia -J193- (53) | | | |
SEAT LEON 2002 Glow plug activation control unit:
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