Discovery electrical Manual — part 70
POWER SEATS
M1
CIRCUIT OPERATION
1
CIRCUIT OPERATION
Driver Seat
When the Ignition Switch (X134) is in position I or II,
or the left front door is open, the Left Seat Power
Relay (K113) is energised. Battery voltage is then
applied to the Left Front Seat Control Switch (X152)
through the closed relay contacts and the Driver’s
Underseat Fuse Box (P108). Ground is applied to
the Left Front Seat Control Switch (X152) at all
times. The Left Front Seat Control Switch (X152)
controls 4 seat control motors via 8 switches. When
each switch is moved to operate its corresponding
motor, one seat switch applies ground while the
other applies battery voltage to the respective seat
motor. The motor turns to adjust the seat in the
requested direction.
Passenger Seat
Battery voltage is applied to the Right Front Seat
Control Switch (X121) at all times. When the Ignition
Switch (X134) is in position I or II, the Right Seat
Power Relay (K131) is energised, applying ground to
the Right Front Seat Control Switch (X121). The
Right Front Seat Control Switch (X121) controls 4
seat control motors via 8 switches. When each
switch is moved to operate its corresponding motor,
one seat switch applies ground while the other
applies battery voltage to the respective seat motor.
The motor turns to adjust the seat in the requested
direction.
POWER SEATS
M1
2
CIRCUIT DIAGRAM
REV: 11/97
86
0
[1]
30
MF 3
60 A
S306
See Power Dis-
tribution
X
F 6
20 A
1
C115
30
C348
86
85
30
87
NP
NP
1
C226
See Fuse Details
87
C348
85
WN
PU
S2013
HJ1
86
87
C358
85
87
30
30
C358
86
PU
S319
BP
S2095
LGW
B
B
S320
1
C2086
85
B
M1-4
A
M1-3
Theft Alarm Sys-
tem
P125
Engine Compart-
ment Fuse Box
BP
P126
Fascia Fuse Box
K113
Left Seat Power
Relay
Z222
Right Seat Power
Relay Diode
Z223
Left Seat Power
Relay Diode
HJ2
K131
Right Seat Power
Relay
X150
Left Front Door
Switch
[1]
Open
PG
E301
See Ground Dis-
tribution
B
Multi–Function
Unit (MFU)
POWER SEATS
M1
3
CIRCUIT DIAGRAM
WN
)%-!)*
*!+ ,*! (/
WY
WR
!"+ )('+ !+
('+)(& .%+$
[1]
Forward
[2]
Backward
[3]
Front Down
[4]
Front Up
[5]
Recline
[6]
Raise
[7]
Rear Down
[8]
Rear Up
Y
G
WLG
!+ *! (+()
G
Y
WB
!+ !%#$+
)('+ (+()
G
Y
WU
!+ !&%'!
(+()
G
Y
WO
!+ !%#$+
!) (+()
WS
WK
WP
A
M1-2
WN
E301
See Ground Dis-
tribution
B
B
POWER SEATS
M1
4
CIRCUIT DIAGRAM
SN
''$ &' $,
&'( )' %+
WO
WU
Y
G
SB
( ' %(%&
G
Y
SW
( " !(
&%$( %(%&
G
Y
SU
( #"$
%(%&
G
Y
SR
( " !(
& %(%&
SG
SY
SP
BP
B
M1-2
" !( &%$( (
%$(&%# *"(!
[1]
Forward
[2]
Backward
[3]
Front Down
[4]
Front Up
[5]
Recline
[6]
Raise
[7]
Rear Down
[8]
Rear Up
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