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INDEX
page
SCHEMATICS AND DIAGRAMS........................................................... 1
DESCRIPTION AND OPERATION.......................................................... 7
Component Page
A/C Heater Control Switch.............8W-50-2
Fog Lamp Relay...................8W-50-3, 6
Front Fog Lamp Switch.............8W-50-5, 6
Fuse 2 (FB).......................8W-50-2, 5
Fuse 3 (PDC)........................8W-50-2
Fuse 9 (FB).......................8W-50-2, 4
Fuse 16 (PDC).......................8W-50-6
Fuse 17 (FB)......................8W-50-3, 4
Fuse 18 (FB)........................8W-50-3
Fuse Block.........................8W-50-2
Fuse Block.........................8W-50-3
Fuse Block.........................8W-50-4
Fuse Block.........................8W-50-5
G101..........................8W-50-3, 4, 6
G103..........................8W-50-3, 4, 6
G204............................8W-50-4, 6
Headlamp Dimmer And Optical
Horn Switch..................8W-50-2, 3, 4
Headlamp Leveling Switch...........8W-50-2, 4
Headlamp Switch..............8W-50-2, 4, 5, 6
Instrument Cluster...................8W-50-3
Left Fog Lamp......................8W-50-6
Left Headlamp..................8W-50-3, 4, 6
Left Headlamp Leveling Motor..........8W-50-4
Left License Lamp...................8W-50-5
Left Park/Turn Signal Lamp............8W-50-5
Power Distribution Center...........8W-50-2, 6Component Page
Radio..............................8W-50-5
Rear Fog Lamp Switch..............8W-50-2, 6
Right Fog Lamp.....................8W-50-6
Right Headlamp.....................8W-50-3
Right Headlamp Leveling Motor.........8W-50-4
Right Park/Turn Signal Lamp.........8W-50-3, 5
Right Repeater Lamp.................8W-50-3
S107............................8W-50-3, 6
S108..............................8W-50-4
S113 ..............................8W-50-5
S114 ..............................8W-50-3
S115 ..............................8W-50-6
S116 ..............................8W-50-3
S117 ..........................8W-50-3, 4, 6
S127..............................8W-50-3
S133............................8W-50-3, 4
S201..............................8W-50-6
S202..............................8W-50-4
S207..............................8W-50-3
S209..............................8W-50-3
S210............................8W-50-2, 4
S213..............................8W-50-2
S221..............................8W-50-2
S306..............................8W-50-5
Turn Signal/Hazard Switch.............8W-50-3
8W - 50 - 2 8W - 50 FRONT LIGHTINGPL
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Downloaded from www.Manualslib.com manuals search engine 40A
FUSE
3
BATT A0
POWER
DISTRIBUTION
CENTER
8
A3
12
RD/WT
3
C102
S213
3
A3
12
RD/WT
A3
12
RD/WT
22
PK/RD20 F33
BATT A3
2FUSE15A
1
4
0
2
1
0 OFF 2 PARK
1 HEAD
SWITCH
HEADLAMP
2 24A BREAKER
CIRCUIT1
BLOCK
FUSE
72
L2
14
LG
L2
14
LG
L20
14
LG/WT
TN20 E1 1
S221
31
231
2
HORN OPTICAL
AND
DIMMER
HEADLAMP
SWITCH
1 HIGH
2 LOW
3 OPTICAL
2 4
FUSE
BLOCK9
4A
FUSE
9
29
E2
20
OR
46
HEADLAMP
LEVELING
SWITCH
E2
20
ORE2
22
OR
S210
SWITCH LAMP
FOG
REAR A/C
HEATER
CONTROL
SWITCH
7E2 22OR
9
3
1 (8W-10-6)(8W-10-4)
(8W-10-6)(8W-10-4) (8W-10-6)
(8W-11-4)(8W-11-2)
(8W-11-12)
(8W-11-2)
(8W-11-11)
(8W-50-4)(8W-11-11)
(8W-51-6) (8W-42-3)
8W - 50 - 2 8W-50 FRONT LIGHTINGPL-RHD
978W-1PLR05001
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2
L44
18
VT/BK
HEADLAMP RIGHT
FEED BEAMLOW
HEADLAMP
DIMMER
AND
OPTICAL
HORN
SWITCH
1
L4
14
VT/WT
RD/OR14L3 3
HIGH
BEAM
FEED
FUSE
BLOCK
38
18FUSE10A
17
10A
FUSE
17
37
L3
14
RD/ORL3
16
RD/OR
CLUSTER INSTRUMENT S209
2C114C101
L3
16
RD/OR
VT/RD20 L44
RD/OR16L3
1
BK18Z1
BK18Z1
S107
G101
3
G103S117
Z1
18
BK
31
SWITCH HAZARD
SIGNAL/
TURN
3C1
TN22 L60 L60
22
TN
S207
L60
22
TN
16C103
TN22 L60
S116
L60
18
TNL60
18
TN
11
2LAMP REPEATER
RIGHT3LAMP
SIGNAL
TURN
PARK/
RIGHT
BK18Z1 Z1
18
BK
S127
Z1
18
BK
LEFT
HEADLAMP
46
(IN PDC) RELAY
LAMP
FOG
Z1
18
BK
1
L3
16
RD/OR
S114
L43 20VT
2
16C103
L43
20
VT
L43
18
VT
S133
(8W-50-2)
(8W-11-2)
(8W-11-12) (8W-11-12)
(8W-40-2)
(8W-40-4)
(8W-15-2)
(8W-15-2)
(8W-15-4)(8W-15-4) (8W-52-3)
(8W-52-3)
(8W-50-6)(8W-11-2)
PL-RHD8W-50 FRONT LIGHTING 8W - 50 - 3
PLR05002978W-1
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FUSE
BLOCK
SWITCH HORN
OPTICAL
AND
DIMMER
HEADLAMP
37
17FUSE10A
VT20 L43
C10316
L43
20
VT
L43
20
VT
352
SWITCH LEVELING
HEADLAMP
L13
20
BR/YL
10C101
L13
22
BR/YL
Z1
20
BK
S202
Z1
20
BK
21
3
MOTOR LEVELING
HEADLAMP
LEFT
RIGHT
HEADLAMP
LEVELING
MOTOR
31
2
BR/YL22 L13VT22 L43 L43
22
VT2
S133
L43
18
VT
G204G101
S108
Z1
22
BK
Z1
14
BK
BK14Z1
BK22Z1
S117
G103
17
HEADLAMP LEFT
LOW
BEAM
FEED
4E2
20
OR
S210
9
4A
FUSE
9
29
BLOCK FUSE
1
3 HEAD
2 PARK
1 OFF
SWITCH
HEADLAMP
BATT F33
E1
20
TN
(8W-11-2) (8W-50-2)
(8W-11-12)
(8W-15-7)
(8W-15-7) (8W-15-2)(8W-15-2) (8W-15-4)
(8W-15-4)(8W-50-3) (8W-11-11)(8W-11-11)(8W-11-2)(8W-50-2) (8W-11-4)
MM
8W - 50 - 4 8W-50 FRONT LIGHTINGPL-RHD
978W-1PLR05003
3
2 1
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PK/RD20 F33
BATT A3
2FUSE15A
1BLOCK
FUSE
4
9
3 OFF
2 PARK
1 HEAD
SWITCH
HEADLAMP
1
2 0
C24
RADIOL7
20
BK/YL
L7 20BK/YL
2C230
1
SWITCH LAMP
FOG
FRONT
L7 20BK/YL
BK/YL20 L7
S306
L7
20
BK/YL
2
LEFT
LICENSE
LAMP
L7 20BK/YL
5C105
L7
20
BK/YL
LAMP SIGNAL
TURN
PARK/
LEFT RIGHT
PARK/
TURN
SIGNAL
LAMP
22
BK/YL20 L7 L7
20
BK/YL
S113
(8W-10-6)
(8W-11-4)(8W-11-2)
(8W-50-2)
(8W-47-2)
(8W-50-6)
(8W-11-4)
(8W-51-5)
(8W-52-3) (8W-52-3)
PL-RHD8W-50 FRONT LIGHTING 8W - 50 - 5
PLR05004978W-1
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Downloaded from www.Manualslib.com manuals search engine 45246
HEADLAMP LEFT
5
1WT/LB18 L39
WT/LB18 L39
2
BK/OR14Z3
S201
BK/OR20 Z3
G204
Z1
20
BK
(IN PDC) RELAY
LAMP
FOG
LAMP FOG
LEFT RIGHT
FOG
LAMP
BK20Z1 2
S115
L39
18
WT/LB
1
Z1
18
BK
G103
L35
18
BR/RD
9C101
L35
20
BR/RD
SWITCH LAMP
FOG
FRONT
SWITCH
LAMP
FOG
REAR
15
WT/OR18 F61
WT/OR18 F61
CENTER DISTRIBUTION
POWER
16
16FUSE20A
BATT A0
12C103
F61
18
WT/OR
2
SWITCH LAMP
FOG
REAR
42
3
Z1
18
BK
G101
Z1
18
BK
S107
Z1
18
BK
43
7
L35
20
BR/RD
3
Z3
22
BK/OR
9
3 HEAD 2 PARK
1 OFF
SWITCH
HEADLAMP
BATT F33
1
2C230
L7 20BK/YLL7 20BK/YL
S117
(8W-50-3)(8W-15-7)
(8W-15-7)
(8W-15-4)(8W-51-6) (8W-10-4)
(8W-10-11)
(8W-51-6)
(8W-15-2) (8W-15-2)(8W-50-2)
(8W-15-4)(8W-11-4) (8W-10-4)
8W - 50 - 6 8W-50 FRONT LIGHTINGPL-RHD
978W-1PLR05005
3
2 1
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INDEX
page page
GENERAL INFORMATION
INTRODUCTION......................... 7
DESCRIPTION AND OPERATION
FOG LAMPS (FRONT).................... 8HEADLAMP LEVELING MOTORS............ 8
HEADLAMPS........................... 7
PARKING LAMPS........................ 7
GENERAL INFORMATION
INTRODUCTION
The headlamp switch has 3 positions, ON, PARK
(parking lights) and OFF. Two circuits, L2 and L20
connect the headlamp switch to the headlamp dim-
mer/optical horn switch located in the multi-function
switch. The multi-function switch feeds the low and
high beams of the headlamps.
DESCRIPTION AND OPERATION
PARKING LAMPS
Circuit A3 in the Power Distribution Center (PDC)
connects to a bus bar in the fuse block. One of the
four circuits powered by the bus bar is circuit F33.
Circuit F33 connects to the headlamp switch. A 40
amp fuse in the PDC protects the A3 circuit. A 15
amp fuse, in cavity 2 of the fuse block, protects the
F33 circuit.
The headlamp switch has 3 positions, ON, PARK
(tail lamps) and OFF, plus a dimmer switch. When
the headlamp switch is in the PARK or ON position,
the switch connects circuit F33 to circuit L7. From
the headlamp switch, circuit L7 branches to power
the front parking lamps and rear tail lamps, lavalier
lamps, side marker lamps, and rear license plate
lamp.
GROUND CIRCUIT
Circuit Z1 provides ground for the parking lamps,
headlamps, lavalier lamps, tail lamps, side marker
lamps and rear license plate lamp although different
grounding points are used. Circuit Z1 also provides
the ground path for the headlamps and turn signals.
HELPFUL INFORMATION
²Check for a blown 40 amp fuse in the PDC.
²Check for a blown fuse in cavity 2 of the fuse
block.
²For the left front parking lamp, turn signal, side
marker lamp and left headlamp, the Z1 circuitgrounding point is the left side of the radiator closure
panel.
²For the right front parking lamp, turn signal,
side marker lamp and right headlamp, the Z1 circuit
grounding point is in the right fender side shield.
²Circuit L7 also feeds the radio, if equipped.
²When the headlamp switch is in the PARK or
ON position, the dimmer circuit, F33, also connects
to circuit E1. Circuit E1 powers the ash receiver
lamp, transmission range indicator lamp, instrument
panel cluster illumination lamps, HVAC control
lamp, heated rear window lamp, and radio lamp. A 4
amp fuse, in cavity 12 of the fuse block, protects cir-
cuit E1.
HEADLAMPS
The headlamp switch has 3 positions, ON, PARK
(parking lights) and OFF. Two circuits, L2 and L20
connect the headlamp switch to the headlamp dim-
mer/optical horn switch located in the multi-function
switch. The multi-function switch feeds the low and
high beams of the headlamps.
HEADLAMP SWITCH IN OFF OR PARKING
LAMP POSITION
Circuit A3 originates in the Power Distribution
Center (PDC) and supplies battery voltage for the
headlamp switch. A 40 amp fuse protects the A3 cir-
cuit. The headlamp switch has an internal 24 amp
circuit breaker that connects circuit A3 to either the
L2 or L20 circuits, depending on switch position.
In the OFF and PARK positions the headlamp
switch feeds the L20 circuit that connects to the
multi-function switch. Circuit L20 powers the high
beam circuit when the operator flashes the head-
lamps with the turn signal stalk of the multi-func-
tion switch. When the operator flashes the
headlamps with the stalk, the multi-function switch
connects the L20 circuit to the L3 circuit. The L3 cir-
cuit feeds the high beam of the headlamps.
HEADLAMP SWITCH IN ON POSITION
When the headlamp switch is in the ON position,
it connects the A3 circuit from the PDC to circuit L2.
PL8W - 50 FRONT LIGHTING 8W - 50 - 7
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Downloaded from www.Manualslib.com manuals search engine Circuit L2 connects to the multi- function switch and
feeds the L4 circuit (for low beam operation). The L4
circuit connects to a bus bar in the fuse block. Cir-
cuits L43 and L44 connect to the bus bar in fuse
block and power the low beam headlamps. Circuit
L43 supplies voltage to the left headlamp. Circuit
L44 supplies voltage to the right headlamp. Both the
L43 and L44 circuits have separate 10 amp fuses
located in fuse block. Fuse 17 protects circuit L43,
and fuse 18 protects circuit L44.
When the operator selects high beam operation
with the turn signal stalk of the multi-function
switch, circuit L2 connects to the L3 Circuit L3 pow-
ers high beam operation.
HEADLAMP GROUND
Although circuit Z1 provides ground for the right
and left headlamps it has different termination
points for both. For the right headlamp the Z1 circuit
terminates at the right inner fender shield. For the
left headlamp the Z1 circuit terminates at the left
side of the radiator closure panel.
HELPFUL INFORMATION
²Check for a blown fuse in cavity 17 for L43 and
cavity 18 for L44.
²Check the 40 amp fuse located in the PDC.
²The headlamp switch has a 24 amp internal cir-
cuit breaker.
²For the left front parking lamp, turn signal, side
marker lamp and left headlamp, the Z1 circuit
grounding point is the left side of the radiator closure
panel.
²For the right front parking lamp, turn signal,
side marker lamp and right headlamp, the Z1 circuit
grounding point is in the right fender side shield.
HEADLAMP LEVELING MOTORS
The headlamp leveling system used in this vehicle
uses a variable position switch located in the instru-
ment panel along with headlamp leveling motors
located at the headlamps.
Power for the switch and the leveling motors is
supplied on circuit L43. This circuit is HOT when the
headlamp switch is in the ON position and the oper-
ator has selected LOW beam operation. In addition,circuit L43 is protected by a 10 amp fuse located in
the fuse block and is the feed for the left LOW beam
headlamp.
Ground for the switch is supplied on circuit Z1.
When the operator moves the switch, power is sup-
plied on circuit L13 from the switch to the headlamp
leveling motors. Ground for the leveling motors is
supplied on circuit Z1 and has the same termination
point as the respective headlamps.
The headlamp leveling switch also has a lamp
located in it for night illumination. Power for the
lamp is supplied on circuit E2. The E2 circuit is HOT
when the operator has turned the headlamp switch
to the PARK or ON position. The E2 circuit is pro-
tected by a 4 amp fuse located in the fuse block.
FOG LAMPS (FRONT)
The fog lamp system in this vehicle uses a switch
located in the instrument panel along with a relay
located in the Power Distribution Center (PDC).
Power for the switch is supplied on circuit L7. This
circuit is the feed for the front and rear parking
lamps and is HOT when the headlamp switch is in
the PARK position.
Power for the contact side of the relay is supplied
on circuit F61. This circuit is HOT at all times and
protected by a 20 amp fuse in the PDC. Ground for
the coil side of the relay is supplied in circuit Z1.
When the operator turns the lamps ON by closing
the switch, power flows on circuit L7 through the
switch to circuit L35. Circuit L35 connects from the
switch to the coil side of the fog lamp relay. With this
input the contacts in the fog lamp relay CLOSE con-
necting circuits F61 and L39.
Circuit L39 connects from the relay to the fog
lamps. Ground for the lamps is supplied on circuit
Z1.
HELPFUL INFORMATION
²Check the 20 amp fuse located in the PDC for
the fog lamps
²Check the lamp filament
²Check the grounding points for the lamps,
switch and relay
8W - 50 - 8 8W - 50 FRONT LIGHTINGPL
DESCRIPTION AND OPERATION (Continued)