automatic transmission DODGE NEON 1997 1.G Wiring Diagrams Workshop Manual

Downloaded from www.Manualslib.com manuals search engine NOTES, CAUTIONS, and WARNINGS
Throughout this group additional important infor-
mation is presented in three ways; Notes, Cautions,
and Warnings.
NOTESare used to help describe how switches or
components operate to complete a particular circuit.
They are also used to indicate different conditions
that may appear on the vehicle. For example, an
up-to and after condition.
CAUTIONSare used to indicate information that
could prevent making an error that may damage the
vehicle.
WARNINGSprovide information to prevent per-
sonal injury and vehicle damage. Below is a list of
general warnings that should be followed any time a
vehicle is being serviced.
WARNING: ALWAYS WEAR SAFETY GLASSES FOR
EYE PROTECTION.
WARNING: USE SAFETY STANDS ANYTIME A PRO-
CEDURE REQUIRES BEING UNDER A VEHICLE.
WARNING: BE SURE THAT THE IGNITION SWITCH
ALWAYS IS IN THE OFF POSITION, UNLESS THE
PROCEDURE REQUIRES IT TO BE ON.
WARNING: SET THE PARKING BRAKE WHEN
WORKING ON ANY VEHICLE. AN AUTOMATIC
TRANSMISSION SHOULD BE IN PARK. A MANUAL
TRANSMISSION SHOULD BE IN NEUTRAL.
WARNING: OPERATE THE ENGINE ONLY IN A
WELL-VENTILATED AREA.
WARNING: KEEP AWAY FROM MOVING PARTS
WHEN THE ENGINE IS RUNNING, ESPECIALLY THE
FAN AND BELTS.
WARNING: TO PREVENT SERIOUS BURNS, AVOID
CONTACT WITH HOT PARTS SUCH AS THE RADIA-
TOR, EXHAUST MANIFOLD(S), TAIL PIPE, CATA-
LYTIC CONVERTER, AND MUFFLER.
WARNING: DO NOT ALLOW FLAME OR SPARKS
NEAR THE BATTERY. GASES ARE ALWAYS
PRESENT IN AND AROUND THE BATTERY.WARNING: ALWAYS REMOVE RINGS, WATCHES,
LOOSE HANGING JEWELRY, AND LOOSE CLOTH-
ING.
WIRE CODE IDENTIFICATION
Each wire shown in the diagrams contains a code
(Fig. 1) which identifies the main circuit, part of the
main circuit, gauge of wire, and color. The color is
shown as a two letter code which can be identified by
referring to the Wire Color Code Chart (Fig. 2)
Fig. 1 Wire Code Identification
Fig. 2 Wire Color Code Chart
8W - 01 - 2 8W - 01 GENERAL INFORMATIONPL
DESCRIPTION AND OPERATION (Continued)

Downloaded from www.Manualslib.com manuals search engine 8W-21 STARTING SYSTEM
DESCRIPTION AND OPERATION
STARTING SYSTEM- MANUAL TRANSMISSION
The Power Distribution Center (PDC) supplies bat-
tery voltage to the engine starter motor solenoid
through circuit T40 when the coil side of the engine
starter motor relay energizes. Circut A1 supplies the
battery voltage for the contact side of the relay. Cir-
cuit A1 and circuit T40 are protected by a 30 amp
fuse and feeds the contact side of the engine starter
motor relay. Both the 30 amp fuse and the engine
starter motor relay are located in the PDC.
The ignition switch supplies battery voltage to the
coil side of the engine starter motor relay on circuit
A41 when the key is moved to the START position
and the operator has pressed the clutch pedal to
CLOSE the clutch pedal position switch. Circuit Z1
supplies the ground for the coil side of the engine
starter motor relay. When the coil side of the relay
energizes, the contacts CLOSE, supplying battery
voltage to the engine starter motor solenoid.
Circuit A0 (battery positive cable) supplies battery
voltage to the motor of the starter when the solenoid
energizes.
HELPFUL INFORMATION
²Check for blown engine starter motor fuse in the
PDC.
²Move ignition key to the START position and
with the clutch pedal pressed, listen for starter motor
relay to click. The engine starter motor relay is
located in the PDC.
²Check for a good ground at starter motor.
²The left headlamp ground is the end point for
the starter relay coil ground circuit and is located at
the left side of the radiator closure panel.
STARTING SYSTEM (AUTOMATIC TRANSMISSION)
The Power Distribution Center (PDC) supplies bat-
tery voltage to the engine starter motor solenoid
through circuit T40 when the coil side of the engine
starter motor relay energizes. Circuit A1 supplies
battery voltage to the contact side of the relay. Cir-
cuit A1 and circuit T40 are protected by a 30 amp
fuse and feeds the contact side of the engine starter
motor relay. Both the 30 amp fuse and the engine
starter motor relay are located in the PDC.
The ignition switch supplies battery voltage to the
coil side of the engine starter motor relay on circuit
A41 when the key is moved to the START position
and the park/neutral portion of the park/neutral posi-
tion switch (3 speed transmission) is CLOSED.
Ground for the coil side of the engine starter motor
relay is supplied by circuit T41.Circuit A0 (battery positive cable) supplies battery
voltage to the motor of the engine starter when the
solenoid energizes.
HELPFUL INFORMATION
²Check for blown engine starter motor fuse in the
PDC.
²With the gear selector in the Park or Neutral
position, move ignition key to the START position
and listen for engine starter motor relay to click. The
engine starter motor relay is located in the PDC.
²Check for a good ground at engine starter motor.
PL8W - 21 STARTING SYSTEM 8W - 21 - 3

Downloaded from www.Manualslib.com manuals search engine 8W-30 FUEL/IGNITION SYSTEMS
INDEX
page page
DESCRIPTION AND OPERATION
AUTOMATIC SHUT DOWN RELAY.......... 15
BATTERY FEED........................ 14
BATTERY TEMPERATURE SENSOR......... 18
CAMSHAFT POSITION SENSOR........... 16
CRANKSHAFT POSITION SENSOR......... 16
DATA LINK CONNECTOR................. 15
DUTY CYCLE EVAP/PURGE SOLENOID...... 19
EGR TRANSDUCER (EET) SOLENOID....... 19
ENGINE COOLANT
TEMPERATURE SENSOR............... 16
FUEL INJECTORS....................... 18
FUEL PUMP MOTOR.................... 15
HEATED OXYGEN SENSORS.............. 16
IDLE AIR CONTROL MOTOR.............. 18
IGNITION COIL PACK.................... 18IGNITION SWITCH...................... 14
INTAKE AIR TEMPERATURE SENSOR....... 17
KNOCK SENSOR....................... 17
LOW FUEL DETECT INPUT............... 19
MANIFOLD ABSOLUTE
PRESSURE SENSOR.................. 17
PARK/NEUTRAL POSITION SWITCH INPUT
(3±SPD TRANSMISSION)................ 19
POWER (DEVICE) GROUND............... 14
POWER STEERING PRESSURE SWITCH..... 19
SIGNAL GROUND....................... 14
THROTTLE POSITION SENSOR............ 17
TORQUE CONVERTER CLUTCH SOLENOID
(TCC)............................... 19
VEHICLE SPEED SENSOR................ 15
DESCRIPTION AND OPERATION
IGNITION SWITCH
In the RUN position, the ignition switch connects
circuit A1 from the Power Distribution Center (PDC)
to circuit A21. A 30 amp fuse in the PDC protects cir-
cuits A1 and A21. Circuit A21 feeds a bus bar in the
fuse block. The bus bar feeds circuits G5, F12, and
F15.
²Circuit G5 powers the gauge cluster warning
lamps and the daytime running lamp (DRL) module.
Fuse cavity 11 (5 amp) in the fuse block protects cir-
cuit G5.
²Circuit F12 splices to the Powertrain Control
Module (PCM), duty cycle purge solenoid, EGR sole-
noid, ABS system, and a bus bar in the PDC. The
bus bar in the PDC feeds the coil side of the radiator
fan relay, A/C compressor clutch relay, and the fuel
pump relay. A 15 amp fuse in the fuse block, cavity
10, protects circuit F12.
²Circuit F15 feeds the Airbag Control Module
(ACM). A 10 amp fuse in the fuse block, cavity 9, pro-
tects circuit F15.
BATTERY FEED
Circuit A14 from the Power Distribution Center
(PDC) supplies battery voltage to cavity 46 of the
Powertrain Control Module (PCM). A 20 amp fuse in
the PDC protects circuit A14.
HELPFUL INFORMATION
Circuit A14 connects to a bus bar in the PDC that
the battery feeds. Circuit A14 powers the AutomaticShut Down (ASD) relay and fuel pump relay. The
A14 circuit also splices to the data link connector.
POWER (DEVICE) GROUND
Circuit Z12 connects to cavities 10 and 50 of the
Powertrain Control Module (PCM). The Z12 circuit
provides ground for PCM internal drivers that oper-
ate high current devices like the injectors and igni-
tion coils.
Internal to the PCM, the power (device) ground cir-
cuit connects to the PCM sensor return circuit (from
circuit K4) and the signal ground circuit (Z11).
HELPFUL INFORMATION
Circuit Z12 which supplies ground for the PCM
high current drivers, has the same termination point
as circuit Z11. The termination point is the left side
of the radiator closure panel.
If the system loses ground for the ganged circuits,
at the left side of the radiator closure panel, the vehi-
cle will not operate. Check the connection at the
ganged ground circuit eyelet.
SIGNAL GROUND
The signal ground circuit Z11 connects to cavity 47
of the PCM. The Z11 circuit provides ground for the
sensors that provide inputs to the PCM. Internal to
the PCM, the signal ground circuit connects to the
PCM sensor return circuit (from circuit K4) and the
power (device) ground circuit (Z12).
The termination point for circuit Z11 is an eyelet
attached to the left side of the radiator closure panel.
8W - 30 - 14 8W - 30 FUEL/IGNITION SYSTEMSPL

Downloaded from www.Manualslib.com manuals search engine ²Circuit K59 connects to cavity 58 of the PCM
connector.
²Circuit K60 connects to cavity 49 of the PCM
connector.
POWER STEERING PRESSURE SWITCH
The power steering pressure switch opens and
closes circuit K10 between the Powertrain Control
Module (PCM) and ground. Circuit K10 connects to
cavity 45 of the PCM connector.
Circuit Z12 provides ground for the power steering
pressure switch. The grounding point for circuit Z12
is the left side of the radiator closure panel.
TORQUE CONVERTER CLUTCH SOLENOID (TCC)
The Powertrain Control Module (PCM) operates
the TCC solenoid by providing a ground path on cir-
cuit K54. Circuit K54 connects to PCM cavity 79.
Circuit F12 supplies battery voltage to the TCC
solenoid. Circuit F12 connects to a bus bar in the
fuse block fed by circuit A21. A 15 amp fuse in the
fuse block, cavity 10, protects circuit F12. Circuit F12
connects to cavity 20 of the PCM connector.
HELPFUL INFORMATION
Circuit F12 splices to feed the ABS control module,
PCM, EGR solenoid, leak detection pump, and the
duty cycle EVAP/Purge solenoid. The F12 circuit also
connects to a bus bar in the PDC that supplies volt-
age to the coil side of radiator fan relay, A/C clutch
relay, and fuel pump relay.
In the RUN or START position, the ignition switch
connects circuit A1 from the fuse block and circuit
A21. Circuit A1 connects to battery voltage and is
protected by a 30 amp fuse in the PDC.
DUTY CYCLE EVAP/PURGE SOLENOID
Circuit F12 supplies battery voltage to the Duty
Cycle EVAP/Purge solenoid. The Powertrain Control
Module (PCM) switches ground path for the solenoid
ON and OFF through circuit K52.
Circuit F12 connects to a bus bar in the fuse block
fed by circuit A21. A 15 amp fuse in the fuse block,
cavity 10, protects circuit F12. Circuit F12 also con-
nects to cavity 20 of the PCM connector.
Circuit K52 connects to cavity 68 of the PCM, and
cavity 1 of the solenoid connector.
HELPFUL INFORMATION
Circuit F12 splices to feed the ABS control module,
PCM, EET solenoid, leak detection pump, and the
TCC solenoid. The F12 circuit also connects to a bus
bar in the PDC that supplies voltage to the coil side
of radiator fan relays, A/C clutch relay, and fuel
pump relay.
In the START or RUN position, the ignition switch
connects circuit A1 from the fuse block and circuitA21. Circuit A1 connects to battery voltage and is
protected by a 30 amp fuse in the PDC.
EGR TRANSDUCER (EET) SOLENOID
Circuit F12 supplies battery voltage to the EET
solenoid. The Powertrain Control Module (PCM)
switches ground path for the solenoid ON and OFF
through circuit K35.
Circuit F12 connects to a bus bar in the fuse block
fed by circuit A21. A 15 amp fuse in the fuse block,
cavity 10, protects circuit F12. Circuit F12 also con-
nects to cavity 20 of the PCM.
Circuit K35 connects to cavity 40 of the PCM con-
nector.
HELPFUL INFORMATION
Circuit F12 splices to feed the ABS control module,
PCM, Duty Cycle EVAP/Purge solenoid, leak detec-
tion pump, and the TCC solenoid. The F12 circuit
also connects to a bus bar in the PDC that supplies
voltage to the coil side of radiator fan relays, A/C
clutch relay, and fuel pump relay.
In the START or RUN position, the ignition switch
connects circuit A1 from the fuse block and circuit
A21. Circuit A1 connects to battery voltage and is
protected by a 30 amp fuse in the PDC.
LOW FUEL DETECT INPUT
Circuit G4 provides an input to the Powertrain Con-
trol Module (PCM) indicating fuel tank level. This cir-
cuit connects to cavity 23 of the PCM connector.
The G4 circuit is also used for the fuel gauge
located in the instrument cluster. For operation of
the fuel gauge, refer to section 8W-40.
PARK/NEUTRAL POSITION SWITCH INPUT (3±SPD
TRANSMISSION)
On vehicles equipped with the 3±spd automatic
transmission the park/neutral switch provides an
input to the Powertrain Control Module (PCM).
When CLOSED, the park/neutral position switch
provides a ground path on circuit T41 for the coil
side of the engine starter motor relay. The case
grounded switch provides ground for circuit T41.
Circuit A41 from the ignition switch provides bat-
tery voltage to the coil side of the relay.
Circuit T41 splices to cavity 76 of the PCM. The
park/neutral position switch provides an input to the
Powertrain Control Module (PCM).
HELPFUL INFORMATION
In the START position, the ignition switch connects
circuit A1 from the Power Distribution Center (PDC)
to circuit A41. A 30 amp fuse protects circuits A1 and
A41.
PL8W - 30 FUEL/IGNITION SYSTEMS 8W - 30 - 19
DESCRIPTION AND OPERATION (Continued)

Downloaded from www.Manualslib.com manuals search engine 8W-40 INSTRUMENT CLUSTER
INDEX
page page
DESCRIPTION AND OPERATION
AIRBAG WARNING LAMP.................. 8
ANTI-LOCK WARNING LAMP............... 9
BRAKE WARNING INDICATOR LAMP......... 8
CHARGE INDICATOR LAMP................ 8
ENGINE COOLANT TEMPERATURE GAUGE . . . 7
FUEL GAUGE........................... 7
HEADLAMP ON CHIME.................... 8
HELPFUL INFORMATION.................. 9
HIGH BEAM INDICATOR LAMP.............. 8
INSTRUMENT CLUSTER.................. 7KEY-IN CHIME.......................... 8
LOW FUEL LAMP........................ 8
LOW OIL PRESSURE LAMP................ 8
ODOMETER............................ 8
RIGHT AND LEFT TURN
SIGNAL INDICATORS................... 8
SEAT BELT WARNING INDICATOR........... 8
SERVICE ENGINE SOON LAMP............. 8
SPEEDOMETER......................... 7
TACHOMETER.......................... 7
DESCRIPTION AND OPERATION
INSTRUMENT CLUSTER
The Instrument Cluster, located on the right side
of the instrument panel, provides the operator with
gauges and warning lamps relating to vehicle opera-
tion. All gauges in the standard and optional cluster
are magnetic type and logic driven.
Battery voltage for the clusters warning lamps and
gauges is provided on the G5 circuit. This circuit con-
nects from the fuse block and is protected bya5amp
fuse located in cavity 11. The cluster is powered only
when the ignition switch is in the START or RUN
position. The cluster is also powered on initial driv-
er's door opening.
Illumination lamps, internal to the cluster, receive
battery voltage on the E2 circuit from the 4 amp fuse
located in cavity 12 of the fuse block. This circuit is
HOT only when the headlamp switch is in the ON
position. Grounding for the cluster is provided on the
Z3 circuit and terminates at the instrument panel
left center support.
The M1 circuit also feeds the cluster through a 10
amp fuse in the Power Distribution Center (PDC).
This fuse is HOT at all times and also used to power
the underhood lamp, and the interior lamps. The
fuse is also lifted OPEN during vehicle shipping to
reduce battery draw.
SPEEDOMETER
The speedometer and odometer receive their infor-
mation on the G7 circuit from the Vehicle Speed Sen-
sor (VSS) on manual and 3±spd automatic
transmission applications. The G7 circuit also pro-
vides a signal to the Powertrain Control Module
(PCM).Logic internal to the instrument cluster adjusts the
position of the gauge pointer to the correct vehicle
speed using the signal on the G7 circuit.
TACHOMETER
The tachometer is connected to the Powertrain
Control Module (PCM) on the G21 circuit. It uses
solid state circuity to decode the ignition pulses
received from the PCM to adjust the gauge pointer to
the proper position.
ENGINE COOLANT TEMPERATURE GAUGE
The temperature gauge is connected to the engine
coolant temperature sensor on the G20 circuit. The
engine coolant temperature sensor for the gauge is a
combination unit. One side of the unit is used for the
Powertrain Control Module (PCM) and the other side
for the cluster. The sending unit is case grounded to
the engine.
The logic driven gauge moves in response to the
measured resistance of the engine coolant tempera-
ture sending unit.
FUEL GAUGE
The fuel level gauge is connected to the fuel pump
module on the G4 circuit. The fuel pump module con-
tains the fuel pump and a variable resistor for the
gauge. Grounding for the fuel pump module is pro-
vided on the Z2 circuit and terminates at the left
rear wheel house.
The logic driven gauge moves in response to the
measured resistance of the fuel tank sending unit.
The fuel level sensor contains a variable resistor.
As the position of the float arm on the level sensor
changes, the resistor changes the current flow
through the fuel gauge circuit. A change in current
flow alters the magnetic field in the fuel gauge which
changes the pointer position.
PL8W - 40 INSTRUMENT CLUSTER 8W - 40 - 7

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 8W-42 AIR CONDITIONING-HEATER
INDEX
page page
DESCRIPTION AND OPERATION
A/C OPERATION......................... 6
AIR CONDITIONING-HEATER SYSTEM....... 6BLOWER MOTOR OPERATION............. 6
HELPFUL INFORMATION.................. 7
RADIATOR FAN OPERATION............... 6
DESCRIPTION AND OPERATION
AIR CONDITIONING-HEATER SYSTEM
The A/C-Heater System is powered by a by several
fuses. Fuse 10, a 15 amp fuse located in the fuse
block, is HOT in the RUN position. This fuse powers
the coil side of the A/C compressor clutch relay
located in the Power Distribution Center (PDC).
A 30 amp fuse, on circuit A16 located in the PDC,
powers the solid state radiator fan relay. This fuse is
HOT at all times. The 10 amp fuse on circuit A17
located in the PDC powers the contact side of the A/C
compressor clutch relay.
The A/C-Heater blower motor is protected by a 25
amp fuse located in cavity 7 of the fuse block. This
fuse in HOT in the RUN position only. When the
ignition switch is in the RUN position, power is sup-
plied to the fuse on circuit A22. The power leaves the
fuse on circuit C1 and goes directly to the blower
motor.
There is a 4 amp fuse located in cavity 12 of the
fuse block used for the illumination lamps in the A/C-
Heater control. The fuse is HOT at all times.
A/C OPERATION
When the A/C or the defrost switch is put in the
ON position, and the A/C cycling switch, low pressure
cut-out switch, and the high pressure switch are
CLOSED, the Powertrain Control Module (PCM)
receives a request for A/C.
After receiving this input, the PCM activates the
A/C compressor by grounding the C28 circuit on the
coil side of the A/C Compressor Clutch relay. Power
for the coil side of the relay is supplied on the bus
bar located in the Power Distribution Center (PDC).
With the coil energized, current flows from the 10
amp fuse in the PDC on circuit A17 through the
CLOSED contacts in the relay, on the C3 circuit to
the A/C compressor clutch.
The A/C compressor clutch receives this voltage
and creates a magnetic field energizing the clutch.
Ground for the coil is provided at the right headlamp
ground.
The connector at the A/C compressor has a diode
located in it. This diode is used to control the inducedvoltage resulting from the magnetic field collapsing
when the clutch is disengaged. The diode provides a
path for the voltage to protect other components and
systems.
The A/C compressor clutch relay is also used by the
PCM to disengage the compressor in a Wide Open
Throttle (W.O.T.) condition.
RADIATOR FAN OPERATION
The radiator fan system used in this vehicle uses a
solid state relay that controls the speed of the radia-
tor fan.
Power for the relay is supplied on circuit A16 This
circuit is HOT at all times and protected by a 30 amp
fuse located in the Power Distribution Center (PDC).
Ground for the coil side of the relay is controlled by
the Powertrain Control Module (PCM). When the
PCM determines the need for fan operation the PCM
supplies the ground path for circuit K173. This cir-
cuit connects to cavity 18 of the PCM connector.
From the relay circuit C25 connects to the radiator
fan motor(s). On vehicles equipped with the manual
transmission only one radiator fan is used. For vehi-
cles equipped with an automatic transmission there
are two radiator fans used.
Ground for the radiator fans is supplied on circuit
Z1.
BLOWER MOTOR OPERATION
With the ignition switch in the RUN position,
power flows from the 25 amp fuse, in cavity 7 of the
fuse block, to the blower motor. Blower motor speed
is controlled by the fan control switch located in the
instrument panel, and the resistor block.
Blower motor LOW speed operation is accom-
plished on the C4 circuit. When the control switch is
moved to the LOW speed position, current is passed
on the C7 circuit through the blower motor resistor
to the C4 circuit. It then flows through the blower
motor switch to the Z8 circuit. The Z8 circuit termi-
nates at a grounding point on the instrument panel
left center support.
The operation of the blower motor M1 and M2
speed operations is the same as the LOW speed
8W - 42 - 6 8W - 42 AIR CONDITIONING-HEATERPL

Downloaded from www.Manualslib.com manuals search engine STOP LAMPS
Circuit F32 in the Power Distribution Center
(PDC) feeds the stop lamps. Circuit F32 connects to
the stop lamp switch. A 15 amp fuse in the PDC pro-
tects circuit F32.
When the operator presses the brake pedal, the
stop lamp switch CLOSES and connects circuit F32
to circuit L50. Circuit L50 connects to the stop
lamps. Circuit L50 also splices to power the CHMSL
lamp.
GROUND CIRCUIT
Circuit Z1 provides ground for the stop lamps,
CHMSL lamp, and the stop lamp switch. The Z1 cir-
cuit has more than one grounding point. It also sup-
plies ground path for the tail lamps, parking lamps,
headlamps, side marker lamps, rear license plate
lamp, back-up lamps and turn signals.
HELPFUL INFORMATION
²Check for blown fuses in circuit F32 (in PDC).
²Check for continuity across the stop lamp switch
when it is CLOSED.
²For rear lighting on the left side of the vehicle,
the Z1 circuit grounding point is in the left rear
wheel well.
²For rear lighting on the right side of the vehicle,
the Z1 circuit grounding point is in the right rear
wheel well.
²For the stop lamp switch, the Z1 circuit ground-
ing point is in the left front inner fender shield.
BACK-UP LAMPS
In the RUN position, the ignition switch connects
circuit A2 from the Power Distribution Center (PDC)to circuit A22. Circuit A22 feeds a bus bar in the fuse
block. A 40 amp fuse in the PDC protects the A2 and
A22 circuits.
Circuit F20 is one of four circuits that connects to
the fuse block bus bar fed by circuit A22. Circuit F20
supplies power to the back-up lamp switch. On 3±spd
automatic transaxle vehicles, the back-up lamp
switch is part of an assembly that includes the park/
neutral position switch.
When the operator puts the transmission in
REVERSE, the back-up lamp switch connects circuit
F20 to circuit L1. Circuit L1 feeds the back-up lamps.
A 10 amp fuse, in cavity 8 of the fuse block, protects
F20 and L1 circuits.
GROUND CIRCUIT
Circuit Z1 provides ground for the back-up lamps.
The Z1 circuit has more than one grounding point. It
also supplies ground path for the tail lamps, parking
lamps, headlamps, side marker lamps, rear license
plate lamp, stop lamps and turn signals.
HELPFUL INFORMATION
²Check for blown fuses in circuits A2 and F20.
²Check for continuity across the stop lamp switch
when it is CLOSED.
²For rear lighting on the left side of the vehicle,
the Z1 circuit grounding point is in the left rear
wheel well.
²For rear lighting on the right side of the vehicle,
the Z1 circuit grounding point is in the right rear
wheel well.
²Circuit F20 feeds the heated rear window switch
and A/C clutch cycling switch.
8W - 51 - 10 8W - 51 REAR LIGHTINGPL
DESCRIPTION AND OPERATION (Continued)