
Downloaded from www.Manualslib.com manuals search engine ODOMETER
The speedometer and odometer receive their infor-
mation on the G7 circuit from the Vehicle Speed Sen-
sor (VSS) on vehicles equipped with the manual or
3±spd automatic transmission. This circuit also pro-
vides a signal to the Powertrain Control Module
(PCM).
Logic internal to the cluster steps the odometer at
a high rate to indicate the proper mileage.
SERVICE ENGINE SOON LAMP
The Service Engine Soon lamp illuminates when
the ignition switch is in the ON position and prior to
starting the vehicle. The lamp will turn off after the
vehicle is started.
If while the vehicle is running a problem is
detected in the engine control system the lamp is
illuminated. This is accomplished by the Powertrain
Control Module (PCM) grounding the G3 circuit.
SEAT BELT WARNING INDICATOR
The fasten seat belt indicator is used with the
warning chime to indicate to the operator to fasten
the seat belt. There is a switch located in the drivers
side B-pillar that is normally OPEN with the seat
belt buckled.
If the seat belt is not buckled the switch CLOSES
and a ground path is completed from the G10 circuit
to the Z1 circuit. This will illuminate the lamp in the
instrument cluster.
When the ignition switch is moved to the START
position the lamp will illuminate. Logic internal to
the instrument cluster determines the length of time.
LOW FUEL LAMP
The low fuel lamp is used to indicate to the opera-
tor that the fuel level is below a predetermined level.
This lamp is logic driven by the instrument cluster.
When the instrument cluster determines a low fuel
condition based on an input from the fuel tank gauge
level sending unit (circuit G4) it illuminates the
lamp.
HEADLAMP ON CHIME
The headlamp ON chime is used to indicate to the
operator that the headlamps or parking lamps are
ON when the drivers door is OPEN. If the lamps are
ON and the drivers door is opened, a ground path is
completed from the G26 circuit at the cluster,
through the headlamp switch, to the G16 circuit and
ending at the door ajar switch. The door ajar switch
is case grounded.
KEY-IN CHIME
The key-in chime is used to indicate to the opera-
tor that the key is in the ignition with the driversdoor OPEN. If the key is in the ignition and the driv-
ers door is OPEN, a ground path is completed from
the G26 circuit at the cluster, through the CLOSED
key-in switch, to the G16 circuit and terminating at
the door ajar switch which is case grounded.
CHARGE INDICATOR LAMP
The Charge Indicator lamp is used to alert the
operator that the charging system voltage has fallen
below the normal operating range. This circuit is con-
trolled by the Powertrain Control Module (PCM).
When the PCM determines a problem, it grounds the
G12 circuit.
AIRBAG WARNING LAMP
The Airbag Warning lamp is used to alert the oper-
ator of a problem with the Airbag system. The lamp
is illuminated when the Airbag Control Module
(ACM) grounds the R41 circuit. Refer to the appro-
priate section of the Service Manual or Diagnostic
Test Procedures Manual to diagnosis this system.
LOW OIL PRESSURE LAMP
The low oil pressure lamp is used to indicate to the
operator that the engine oil pressure has dropped
below a predetermined pressure. Power for the lamp
is provided on the G5 circuit which also powers the
other warning lamps.
When the oil pressure is low the normally OPEN
oil pressure switch CLOSES completing a path to
ground on circuit G6. The oil pressure switch is case
grounded to the engine block.
HIGH BEAM INDICATOR LAMP
The High Beam Indicator Lamp is used to indicate
to the operator that the high beam headlamps are
ON. Power is supplied to the cluster on the L3 cir-
cuit. Ground is provided on the Z3 circuit.
Circuit L3 connects from the headlamp dimmer
switch to the instrument cluster.
RIGHT AND LEFT TURN SIGNAL INDICATORS
These lamps are used to indicate to the operator
which turn signal is ON. Power for the lamps comes
from the turn signal switch. The L60 circuit is for the
right turn indicator, and the L61 circuit is used for
the left turn signal indicator. Ground for the circuits
is provided on the Z3 circuit.
BRAKE WARNING INDICATOR LAMP
The Brake Warning Indicator lamp is used to alert
the operator of a problem with the vehicles braking
system. The lamp illuminates when the ignition
switch is turned to START position to perform a self
check.
8W - 40 - 8 8W - 40 INSTRUMENT CLUSTERPL
DESCRIPTION AND OPERATION (Continued)

Downloaded from www.Manualslib.com manuals search engine There are two switches used in this system and
they are wired in parallel form. A parking brake
switch located on the parking brake mechanism will
illuminate the lamp if the normally OPEN switch is
CLOSED. This switch is case grounded.
The other switch used is the brake warning lamp
switch. This switch is normally OPEN. When the
brake system pressure is below a predetermined level
the switch CLOSES and completes a path to ground
from the G9 circuit at the cluster, through the
switch, to the left headlamp ground.
ANTI-LOCK WARNING LAMP
The Anti-Lock warning lamp is used to alert the
driver of a problem in the ABS system. When the
ABS controller determines a problem in the system it
grounds the G19 circuit and illuminates the lamp.
HELPFUL INFORMATION
²Check the 5 amp fuse in cavity 11 of the fuse
block.
²Check the 4 amp fuse in cavity 12 of the fuse
block.
²Check the Ignition-Off Draw fuse in the PDC.
²Check for a good ground at the instrument panel
left center support.
²For additional diagnostic tests refer to the
appropriate section of the Service Manual.
PL8W - 40 INSTRUMENT CLUSTER 8W - 40 - 9
DESCRIPTION AND OPERATION (Continued)

Downloaded from www.Manualslib.com manuals search engine 8W-41 HORNS/CIGAR LIGHTER
INDEX
page
SCHEMATICS AND DIAGRAMS........................................................... 1
DESCRIPTION AND OPERATION.......................................................... 4
Component Page
Cigar Lighter Relay..................8W-41-3
Cigar Lighter/Power Outlet.............8W-41-3
Clockspring.........................8W-41-2
Fuse 1 (FB).........................8W-41-3
Fuse 3 (PDC)........................8W-41-3
Fuse 15 (FB)........................8W-41-3
Fuse 23 (PDC).......................8W-41-2
Fuse Block.........................8W-41-3
G101..............................8W-41-2
G103..............................8W-41-2
G204..............................8W-41-3
Horn No. 1.........................8W-41-2Component Page
Horn No. 2.........................8W-41-2
Horn Relay.........................8W-41-2
Left Horn Switch.....................8W-41-2
Power Distribution Center...........8W-41-2, 3
Right Horn Switch...................8W-41-2
S108..............................8W-41-2
S111 ..............................8W-41-2
S117 ..............................8W-41-2
S131..............................8W-41-2
S202..............................8W-41-3
S206..............................8W-41-3
S213..............................8W-41-3
8W - 41 - 2 8W - 41 HORNS/CIGAR LIGHTERPL

Downloaded from www.Manualslib.com manuals search engine BATT A0
23FUSE10A
POWER
DISTRIBUTION
CENTER
RELAY HORN
6266
6365
CLOCKSPRING
1
SWITCH
HORN
LEFT
SWITCH HORN
RIGHT
5C101
X3
20
BK/RD
B A
BK14Z1
G101 S108
BK14Z1
S111
Z1
20
BK
X2
18
DG/RD
23
23
X3
18
BK/RD
DG/RD18 X2
BK20Z1
S117
Z1
14
BK
G103
A
B
S131
X2
18
DG/RD
HORN
NO. 1 NO. 2HORN
(8W-10-9)(8W-10-4)
(8W-10-4)
(8W-15-2) (8W-15-2) (8W-15-2)
(8W-15-4)
(8W-15-2)
8W - 41 - 2 8W-41 HORN/CIGAR LIGHTER/POWER OUTLETPL-RHD
978W-1PLR04101

Downloaded from www.Manualslib.com manuals search engine 40A
FUSE
3
BATT A0
POWER
DISTRIBUTION
CENTER
A3
12
RD/WT
3C102
A3
12
RD/WT
S213
A3
12
RD/WT
1FUSE15A
BLOCK
FUSE
F38
16
RD
BK20Z1
G204
CIGAR
LIGHTER/
POWER
OUTLET
S202
Z1
20
BK
1
3 73
21
B1
B2
B5B3
F38
18
RD
CIGAR
LIGHTER
RELAY
5
35
RUN A22
15FUSE20A
FUSE
BLOCK
F13
18
DB
F13
18
DB
S206
Z1
20
BK
NOT USEDF38
18
RD
(8W-10-4)
(8W-10-6)(8W-10-4)
(8W-10-6)
(8W-11-4)(8W-11-2)
(8W-15-7) (8W-15-7) (8W-11-12)(8W-10-6)
(8W-11-2)
(8W-11-12)
PL-RHD8W-41 HORN/CIGAR LIGHTER/POWER OUTLET 8W - 41 - 3
PLR04102978W-1

Downloaded from www.Manualslib.com manuals search engine 8W-41 HORNS/CIGAR LIGHTER
DESCRIPTION AND OPERATION
HORNS
The horn system is powered by a 15 amp fuse
located in the Power Distribution Center (PDC)
which is HOT at all times on circuit F31. This circuit
supplies voltage to the coil and contact side of the
horn relay.
When the operator presses the horn switch, a
ground path is completed on the coil side of the horn
relay through the switch. The horn relay, located in
the PDC, then CLOSES the relay contacts. Voltage is
passed through the CLOSED relay contacts on circuit
X2 to the horn. Grounding for the horn is on the Z1
circuit to the left headlamp ground which is located
on the left side of the radiator closure panel.
HELPFUL INFORMATION
²Check the 15 amp fuse in the PDC.²Press the horn switch and listen for the horn
relay to click. A clicking relay indicates voltage is
present up to the switch.
²Check for a good ground at the left headlamp
ground.
CIGAR LIGHTER
The cigar lighter in this vehicle uses a cigar lighter
relay and a cigar lighter element. Power for the cigar
lighter relay is supplied by two sources.
Power for the coil side of the relay is supplied by
circuit F13. This circuit is protected by a 20 amp fuse
located in the fuse block. Power for the contact side
of the relay is supplied on circuit F38. The F38 cir-
cuit is protected by a 15 amp fuse.
Ground for the cigar lighter element and relay is
supplied on circuit Z1.
8W - 41 - 4 8W - 41 HORNS/CIGAR LIGHTERPL

Downloaded from www.Manualslib.com manuals search engine 8W-42 AIR CONDITIONING-HEATER
INDEX
page
SCHEMATICS AND DIAGRAMS........................................................... 1
DESCRIPTION AND OPERATION.......................................................... 6
Component Page
A/C Compressor Clutch................8W-42-2
A/C Compressor Clutch Relay...........8W-42-2
A/C Cycling Switch...............8W-42-3, 4, 5
A/C Heater Blower Motor..............8W-42-3
A/C Heater Control Switch...........8W-42-3, 3
A/C High Pressure Switch..............8W-42-5
A/C Low Pressure Switch............8W-42-4, 5
Blower Motor Resistor Block............8W-42-3
Diode..............................8W-42-2
Fuse 5 (FB).........................8W-42-4
Fuse 5 (PDC)........................8W-42-5
Fuse 7 (FB).........................8W-42-3
Fuse 9 (FB).........................8W-42-3
Fuse 10 (FB)........................8W-42-2
Fuse 18 (PDC).......................8W-42-2
Fuse Block......................8W-42-2, 3, 4Component Page
G101..............................8W-42-5
G103..............................8W-42-2
G203..............................8W-42-3
Headlamp Switch....................8W-42-3
Power Distribution Center...........8W-42-2, 5
Powertrain Control Module...........8W-42-2, 5
Radiator Fan Motor..................8W-42-5
Rear Fog Lamp Switch................8W-42-3
S108..............................8W-42-5
S109..............................8W-42-2
S111 ..............................8W-42-5
S204..............................8W-42-3
S210..............................8W-42-3
S211 ..............................8W-42-4
S314..............................8W-42-3
Solid State Fan Relay.................8W-42-5
8W - 42 - 2 8W - 42 AIR CONDITIONING-HEATERPL

Downloaded from www.Manualslib.com manuals search engine 18
36
35
3271
POWER
DISTRIBUTION
CENTER
15A
FUSE
10
9
30BLOCK FUSE
F12
20
DG/WT
F12
20
DG/WT
F12
18
DG/WT
6C101
Z1
20
BK
G103CLUTCH COMPRESSOR
A/C
C1
64
POWERTRAIN
CONTROL
MODULE S109
C28
18
DB/OR
A/C
COMPRESSOR
CLUTCH
RELAY
CONTROL
ST-RUN A21
10A
FUSE
18
17
BATT A0
1
2
A/C
COMPRESSOR
CLUTCH
RELAY
DIODE
C3 18DB/BK
20BK Z1
(8W-10-4) (8W-11-9)(8W-11-2)
(8W-15-4) (8W-30-11) (8W-11-9)
(8W-10-9) (8W-10-12)
(8W-10-4)
8W - 42 - 2 8W-42 AIR CONDITIONING-HEATERPL-RHD
978W-1PLR04201