1997 DODGE NEON Wiring Diagrams Workshop Manual

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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

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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

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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

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5432
11 A/C ON
67
89
0098 7
6
A/C
SWITCH
ILLUM. BLOWER
SWITCH
ILLUM.
MODE
SWITCH
ILLUM. A/C
HEATER
CONTROL
ILLUM.
BLOWER SWITCHA/C
SWITCH
10 11
A/C
HEATER
CONTROL
0 OFF
1 DEFROST
2 MIX
3 HEAT
4 BI-LEVEL
5 PANEL
6 LOW
7 MED-LOW
8 MED-HIGH
9 HIGH
10 A/C OFF
67
C4
14
TNC5
14
LGC6
14
LBC7
14
BK/TN
C7
14
BK/TN
BLOCK RESISTOR
MOTOR
BLOWER
C2
22
DB/YL
C2
22
DB/YL
1C206
G203
Z8
14
BK/VT
S204
4A
FUSE
9
5
27
29
25A
FUSE
7
9
BLOCK FUSE
2 HEAD
1 PARK
0 OFF
SWITCH
HEADLAMP
1
BATT F33
E2
22
OR
C1
14
DG
C1
14
DG
C7
14
BK/TN
C7
14
BK/TN
4C206
6C206
RUN A22
FUSE
BLOCK
E1
20
TN
1
2
5124
MODE
SWITCH
MODE
SWITCH
OUTPUT
4
3 2
152
1 0
MOTOR BLOWER
HEATER
A/C
A/C
CYCLING
SWITCH
C2256
S314
TOZ8
18
BK/VT
E2
2O
OR
S210
6
SWITCH LAMP
FOG
REAR
E2
22
OR
SWITCH
3
(8W-15-6) (8W-11-11)(8W-11-8)(8W-11-2)
(8W-50-2)
(8W-11-2)(8W-10-6)
(8W-11-4)
(8W-42-4)
(8W-15-6) (8W-11-11) (8W-51-6)M
PL-RHD8W-42 AIR CONDITIONING-HEATER 8W - 42 - 3
PLR04202978W-1

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5
25
10A
FUSE
5
FUSED
IGN.
(RUN)
SWITCH CYCLING
A/C
C2
22
DB/YL
C2
22
DB/YL
F20
20
WT
F20
22
WT
2C206
2
MODE
SWITCH
OUTPUTA/C
CYCLING
SWITCH
OUTPUT
C21
22
DB/OR
3C206
13
1C206
S211
2C101
C21
20
DB/OR
BLOCK FUSE
C21
22
DB/OR
F20
22
WT
62
SWITCH PRESSURE
LOW
A/C
SWITCH CONTROL
HEATER
A/C
(8W-11-8)
(8W-11-8)(8W-11-2)
(8W-42-5) (8W-10-6)
(8W-42-3)
8W - 42 - 4 8W-42 AIR CONDITIONING-HEATERPL-RHD
978W-1PLR04203

Downloaded from www.Manualslib.com manuals search engine 30A
FUSE
5
5 73
BATT A0
POWER
DISTRIBUTION
CENTER
1
2A16
14
GY
RELAY FAN
STATE
SOLID
C2
18
K173
20
DG
K173
20
LG
13C160
Z1
18
BK
S111
Z1
14
BK
Z1
14
BK
C25
14
LG
Z1
14
BK
G101
S108
POWERTRAIN
CONTROL
MODULE MOTOR FAN
RADIATOR
4
13
BR18 C20
DB/OR22 C21
A/C
HIGH
PRESSURE
SWITCH A/C
LOW
PRESSURE
SWITCH
C2
38
DB/OR20 C21
C2063
2
1
2
1
C1605
SENSE SWITCHA/C
BR/OR20 C20
DB/WT20 C22
DB/OR22 C21
1
2
A/C
CYCLING
SWITCH
RADIATOR
FAN
RELAY
CONTROLA/C
CYCLING
SWITCH
OUTPUT
2C101
(8W-10-7)(8W-10-4)
(8W-15-2)
(8W-15-2) (8W-15-2)
(8W-30-11) (8W-10-4)
(8W-42-4)
M
PL-RHD8W-42 AIR CONDITIONING-HEATER 8W - 42 - 5
PLR04204978W-1

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