Onboard supply control unit, Fuse holder A, Fuse holder B, Fuse holder C
A
-
Battery
C
-
Alternator
J519
-
Onboard supply control unit
SA
-
Fuse holder A, on left in engine compartment (low box)
SA1
-
Fuse 1 in fuse holder A
SA5
-
Fuse 5 in fuse holder A
SB
-
Fuse holder B, on left in engine compartment (low box)
SC
-
Fuse holder C, Fuse carrier on left of dash panel
SC12
-
Fuse 12 on fuse holder C
SC17
-
Fuse 17 on fuse holder C
SC23
-
Fuse 23 on fuse holder C
SC26
-
Fuse 26 on fuse holder C
SC28
-
Fuse 28 on fuse holder C
SB29
-
Fuse 29 on fuse holder B
SC33
-
Fuse 33 on fuse holder C
SC34
-
Fuse 34 on fuse holder C
T40a
-
40-pin connector
T52b
-
52-pin connector
507
-
Threaded connection (30), on battery fuse holder
A1
-
Positive connection (30a), in dash panel wiring harness
A40
-
Positive connection 1 (30), in dash panel wiring harness
A62
-
Connection (window regulators), in dash panel wiring harness
A198
-
Positive connection 6 (30a) in dash panel wiring harness
*
-
Only models with 140A alternator
*2
-
Only models with 90A/ 110A alternator
*3
-
According to equipment
León
Current Flow Diagram
No.
149 /
3
ws
=
white
sw
=
black
ro
=
red
rt
=
red
br
=
brown
gn
=
green
bl
=
blue
gr
=
grey
li
=
purple
vi
=
purple
ge
=
yellow
or
=
orange
rs
=
pink
Front left window regulator switch, Driver door control unit, Onboard supply control unit, Driver side window regulator motor
E40
-
Front left window regulator switch
E53
-
Rear left window regulator switch, in driver door
E55
-
Rear right window regulator switch, in driver door
E81
-
Front right window regulator switch in driver door
E318
-
Childproof lock button
J386
-
Driver door control unit
J519
-
Onboard supply control unit
L76
-
Button illumination bulb
T10k
-
10-pin connector
T20a
-
20-pin connector, lower part of A-pillar, driver side
T20g
-
20-pin connector
T32c
-
32-pin connector
V147
-
Driver side window regulator motor
205
-
Earth connection, in driver door wiring harness
Q38
-
Positive connection 1 (58b), in window regulator wiring harness
*
-
Only models with front and rear window regulators
*2
-
Only models with front window regulators
*3
-
Only left-hand drive models
León
Current Flow Diagram
No.
149 /
4
ws
=
white
sw
=
black
ro
=
red
rt
=
red
br
=
brown
gn
=
green
bl
=
blue
gr
=
grey
li
=
purple
vi
=
purple
ge
=
yellow
or
=
orange
rs
=
pink
Front left window regulator switch, Driver side interior locking button for central locking system, Driver door control unit, Onboard supply control unit
E40
-
Front left window regulator switch
E81
-
Front right window regulator switch in driver door
E308
-
Driver side interior locking button for central locking system
J386
-
Driver door control unit
J519
-
Onboard supply control unit
L76
-
Button illumination bulb
T20a
-
20-pin connector, lower part of A-pillar, driver side
T32c
-
32-pin connector
99
-
Earth connection, in console wiring harness
205
-
Earth connection, in driver door wiring harness
*
-
Only models with front window regulators
León
Current Flow Diagram
No.
149 /
5
ws
=
white
sw
=
black
ro
=
red
rt
=
red
br
=
brown
gn
=
green
bl
=
blue
gr
=
grey
li
=
purple
vi
=
purple
ge
=
yellow
or
=
orange
rs
=
pink
Mirror adjustment switch, Exterior mirror heater button, Fold-in mirror switch, Driver door control unit, Onboard supply control unit
E43
-
Mirror adjustment switch
E48
-
Mirror adjustment changeover switch
E231
-
Exterior mirror heater button
E263
-
Fold-in mirror switch
J386
-
Driver door control unit
J519
-
Onboard supply control unit
K174
-
Driver side interior locking warning lamp
L78
-
Mirror adjustment switch illumination bulb
T20a
-
20-pin connector, lower part of A-pillar, driver side
T32c
-
32-pin connector
*
-
Only left-hand drive models
*2
-
Only right-hand drive models
*3
-
Only models with heated exterior mirrors
León
Current Flow Diagram
No.
149 /
6
ws
=
white
sw
=
black
ro
=
red
rt
=
red
br
=
brown
gn
=
green
bl
=
blue
gr
=
grey
li
=
purple
vi
=
purple
ge
=
yellow
or
=
orange
rs
=
pink
Driver door control unit, Onboard supply control unit, Driver side mirror adjustment motor, Heated exterior mirror on driver side
J386
-
Driver door control unit
J519
-
Onboard supply control unit
T8d
-
8-pin connector, in left door, near exterior mirror
T16b
-
16-pin connector
T20a
-
20-pin connector, lower part of A-pillar, driver side
T20g
-
20-pin connector
V17
-
Driver side mirror adjustment motor
V121
-
Driver side fold-in mirror motor
V149
-
Driver side mirror adjustment motor
Z4
-
Heated exterior mirror on driver side
*
-
Only models with heated exterior mirrors
León
Current Flow Diagram
No.
149 /
7
ws
=
white
sw
=
black
ro
=
red
rt
=
red
br
=
brown
gn
=
green
bl
=
blue
gr
=
grey
li
=
purple
vi
=
purple
ge
=
yellow
or
=
orange
rs
=
pink
Driver door control unit, Onboard supply control unit, Driver door lock unit
F2
-
Driver door contact switch
F220
-
Driver side central locking lock unit
J386
-
Driver door control unit
J519
-
Onboard supply control unit
T8s
-
8-pin connector
T20g
-
20-pin connector
VX21
-
Driver door lock unit
V56
-
Driver door central locking motor
V161
-
Driver door central locking deadlock function motor
León
Current Flow Diagram
No.
149 /
8
ws
=
white
sw
=
black
ro
=
red
rt
=
red
br
=
brown
gn
=
green
bl
=
blue
gr
=
grey
li
=
purple
vi
=
purple
ge
=
yellow
or
=
orange
rs
=
pink
Window regulator switch in front passenger door, Front passenger door control unit, Onboard supply control unit, Front passenger door lock unit, Front passenger side window regulator motor
E107
-
Window regulator switch in front passenger door
F3
-
Front passenger door contact switch
F221
-
Front passenger side central locking lock unit
J387
-
Front passenger door control unit
J519
-
Onboard supply control unit
K175
-
Front passenger side interior locking warning lamp
L76
-
Button illumination bulb
T6al
-
6-pin connector
T20b
-
20-pin connector, lower part of A-pillar, front passenger side
T20h
-
20-pin connector
T32a
-
32-pin connector
VX22
-
Front passenger door lock unit
V57
-
Front passenger seat central locking motor
V148
-
Front passenger side window regulator motor
V162
-
Front passenger door central locking deadlock function motor
206
-
Earth connection, in front passenger door wiring harness
*
-
Only right-hand drive models
*2
-
Only left-hand drive models
*3
-
Only models with front and rear window regulators
León
Current Flow Diagram
No.
149 /
9
ws
=
white
sw
=
black
ro
=
red
rt
=
red
br
=
brown
gn
=
green
bl
=
blue
gr
=
grey
li
=
purple
vi
=
purple
ge
=
yellow
or
=
orange
rs
=
pink
Front passenger door control unit, Onboard supply control unit, Front passenger side mirror adjustment motor, Heated exterior mirror on front passenger side
J387
-
Front passenger door control unit
J519
-
Onboard supply control unit
T8c
-
8-pin connector, in right door, near exterior mirror
T16a
-
16-pin connector
T20b
-
20-pin connector, lower part of A-pillar, front passenger side
T20h
-
20-pin connector
V25
-
Front passenger side mirror adjustment motor
V122
-
Front passenger side fold-in mirror motor
V150
-
Front passenger side mirror adjustment motor
Z5
-
Heated exterior mirror on front passenger side
43
-
Earth point, lower part of right A-pillar
*
-
Only models with heated exterior mirrors
León
Current Flow Diagram
No.
149 /
10
ws
=
white
sw
=
black
ro
=
red
rt
=
red
br
=
brown
gn
=
green
bl
=
blue
gr
=
grey
li
=
purple
vi
=
purple
ge
=
yellow
or
=
orange
rs
=
pink
Onboard supply control unit, Rear left door lock unit
F10
-
Rear left door contact switch
F222
-
Rear left central locking lock unit
J519
-
Onboard supply control unit
T6am
-
6-pin connector
T20e
-
20-pin connector, on left B-pillar
T52a
-
52-pin connector
T52b
-
52-pin connector
VX23
-
Rear left door lock unit
V163
-
Rear left door central locking deadlock function motor
V214
-
Rear left door central locking motor, lock
77
-
Earth point, lower part of left B-pillar
373
-
Earth connection 8, in main wiring harness
*
-
Only models with front window regulators
*2
-
Only models with rear electric window regulator
León
Current Flow Diagram
No.
149 /
11
ws
=
white
sw
=
black
ro
=
red
rt
=
red
br
=
brown
gn
=
green
bl
=
blue
gr
=
grey
li
=
purple
vi
=
purple
ge
=
yellow
or
=
orange
rs
=
pink
Onboard supply control unit, Rear right door lock unit, Tank filler flap locking motor
F11
-
Rear right door contact switch
F223
-
Rear right central locking lock unit
J519
-
Onboard supply control unit
T6an
-
6-pin connector
T20f
-
20-pin connector, on right B-pillar
T52a
-
52-pin connector
T52b
-
52-pin connector
VX24
-
Rear right door lock unit
V155
-
Tank filler flap locking motor
V164
-
Rear right door central deadlock function locking motor
V215
-
Rear right door central locking motor, lock
78
-
Earth point, lower part of right B-pillar
369
-
Earth connection 4, in main wiring harness
*
-
Only models with front window regulators
*2
-
Only models with rear electric window regulator
León
Current Flow Diagram
No.
149 /
12
ws
=
white
sw
=
black
ro
=
red
rt
=
red
br
=
brown
gn
=
green
bl
=
blue
gr
=
grey
li
=
purple
vi
=
purple
ge
=
yellow
or
=
orange
rs
=
pink
Rear left window regulator switch, in door, Rear left door control unit, Onboard supply control unit, Rear left door lock unit, Rear left window regulator motor
E52
-
Rear left window regulator switch, in door
F10
-
Rear left door contact switch
F222
-
Rear left central locking lock unit
J388
-
Rear left door control unit
J519
-
Onboard supply control unit
L76
-
Button illumination bulb
T6am
-
6-pin connector
T18b
-
18-pin connector
T20e
-
20-pin connector, on left B-pillar
VX23
-
Rear left door lock unit
V26
-
Rear left window regulator motor
V163
-
Rear left door central locking deadlock function motor
V214
-
Rear left door central locking motor, lock
*
-
Only models with rear electric window regulator
León
Current Flow Diagram
No.
149 /
13
ws
=
white
sw
=
black
ro
=
red
rt
=
red
br
=
brown
gn
=
green
bl
=
blue
gr
=
grey
li
=
purple
vi
=
purple
ge
=
yellow
or
=
orange
rs
=
pink
Rear right window regulator switch, in door, Rear right door control unit, Onboard supply control unit, Rear right door lock unit, Rear right window regulator motor
E54
-
Rear right window regulator switch, in door
F11
-
Rear right door contact switch
F223
-
Rear right central locking lock unit
J389
-
Rear right door control unit
J519
-
Onboard supply control unit
L76
-
Button illumination bulb
T6an
-
6-pin connector
T18c
-
18-pin connector
T20f
-
20-pin connector, on right B-pillar
VX24
-
Rear right door lock unit
V27
-
Rear right window regulator motor
V164
-
Rear right door central deadlock function locking motor
V215
-
Rear right door central locking motor, lock
*
-
Only models with rear electric window regulator
León
Current Flow Diagram
No.
149 /
14
ws
=
white
sw
=
black
ro
=
red
rt
=
red
br
=
brown
gn
=
green
bl
=
blue
gr
=
grey
li
=
purple
vi
=
purple
ge
=
yellow
or
=
orange
rs
=
pink
Rear lid handle release button, Rear lid lock unit, Onboard supply control unit, Rear lid release motor
E234
-
Rear lid handle release button
F256
-
Rear lid lock unit
J519
-
Onboard supply control unit
T5b
-
5-pin connector, on left C-pillar
T5h
-
5-pin connector, in rear lid
T52a
-
52-pin connector
T52b
-
52-pin connector
V139
-
Rear lid release motor
W3
-
Luggage compartment light
218
-
Earth connection 1, in rear lid wiring harness
219
-
Earth connection 2, in rear lid wiring harness
667
-
Earth point, on rear left of roof
A126
-
Connection (rear lid contact switch), in dash panel wiring harness
B150
-
Positive connection 2 (30a), in interior wiring harness
*
-
Only models with no anti-theft alarm system
*2
-
For models with anti-theft alarm system
León
Current Flow Diagram
No.
149 /
15
ws
=
white
sw
=
black
ro
=
red
rt
=
red
br
=
brown
gn
=
green
bl
=
blue
gr
=
grey
li
=
purple
vi
=
purple
ge
=
yellow
or
=
orange
rs
=
pink
Sliding sunroof adjustment regulator, Sunroof button, Sliding sunroof adjustment control unit, Onboard supply control unit, Sliding sunroof motor
E139
-
Sliding sunroof adjustment regulator
E325
-
Sunroof button
J245
-
Sliding sunroof adjustment control unit
J285
-
Control unit in dash panel insert
J519
-
Onboard supply control unit
T6c
-
6-pin connector
T6d
-
6-pin connector
T32b
-
32-pin connector
T52b
-
52-pin connector
V1
-
Sliding sunroof motor
León
Current Flow Diagram
No.
149 /
16
ws
=
white
sw
=
black
ro
=
red
rt
=
red
br
=
brown
gn
=
green
bl
=
blue
gr
=
grey
li
=
purple
vi
=
purple
ge
=
yellow
or
=
orange
rs
=
pink
Onboard supply control unit, Automatic anti-dazzle interior mirror
J519
-
Onboard supply control unit
J681
-
Terminal 15 voltage supply relay 2, on relay carrier, on left of dash panel
SC4
-
Fuse 4 on fuse holder C
T8e
-
8-pin connector
T9c
-
9-pin connector
T52c
-
52-pin connector
Y7
-
Automatic anti-dazzle interior mirror
43
-
Earth point, lower part of right A-pillar
332
-
Earth connection 4, in dash panel wiring harness
371
-
Earth connection 6, in main wiring harness
A13
-
Connection (door contact switch), in dash panel wiring harness
A38
-
Positive connection 2 (15a) in dash panel wiring harness
A87
-
Connection (RL), in dash panel wiring harness
A192
-
Positive connection 3 (15a) in dash panel wiring harness
León
Current Flow Diagram
No.
149 /
17
ws
=
white
sw
=
black
ro
=
red
rt
=
red
br
=
brown
gn
=
green
bl
=
blue
gr
=
grey
li
=
purple
vi
=
purple
ge
=
yellow
or
=
orange
rs
=
pink
Bonnet contact switch, Interior monitoring sensor, Alarm horn, Onboard supply control unit
E267
-
Interior monitoring deactivation switch
F266
-
Bonnet contact switch
G273
-
Interior monitoring sensor
H12
-
Alarm horn
J519
-
Onboard supply control unit
K162
-
Interior monitoring off warning lamp
L118
-
Deactivation of interior monitoring system switch illumination bulb
T3aa
-
3-pin connector
T4e
-
4-pin connector
T52a
-
52-pin connector
T52b
-
52-pin connector
T52c
-
52-pin connector
13
-
Earth point, on right in engine compartment
209
-
Earth connection 6, in engine compartment wiring harness
B161
-
Connection (ATA), in interior wiring harness
B549
-
Connection 2 (LIN bus) in main wiring harness
León
Current Flow Diagram
No.
149 /
18
ws
=
white
sw
=
black
ro
=
red
rt
=
red
br
=
brown
gn
=
green
bl
=
blue
gr
=
grey
li
=
purple
vi
=
purple
ge
=
yellow
or
=
orange
rs
=
pink
Onboard supply control unit, Data bus diagnostic interface
J519
-
Onboard supply control unit
J533
-
Data bus diagnostic interface, under steering wheel
T20k
-
20-pin connector
T52c
-
52-pin connector
B397
-
Connection 1 (convenience CAN bus, high), in main wiring harness
B406
-
Connection 1 (convenience CAN bus, low), in main wiring harness
*
-
see applicable current flow diagram for data bus network
