Dodge 1997 Neon WIRING DIAGRAMS Owner's Manual page 102

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DESCRIPTION AND OPERATION
AIRBAG WARNING LAMP . . . . . . . . . . . . . . . . . . 8
ANTI-LOCK WARNING LAMP . . . . . . . . . . . . . . . 9
BRAKE WARNING INDICATOR LAMP . . . . . . . . . 9
CHARGE INDICATOR LAMP . . . . . . . . . . . . . . . . 8
ENGINE COOLANT TEMPERATURE GAUGE . . . 7
FUEL GAUGE . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
HEADLAMP ON CHIME . . . . . . . . . . . . . . . . . . . . 8
HELPFUL INFORMATION . . . . . . . . . . . . . . . . . . 9
HIGH BEAM INDICATOR LAMP . . . . . . . . . . . . . . 8
HIGH SPEED WARNING MODULE . . . . . . . . . . . 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 by a 5 amp
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
transmission applications. The G7 circuit also pro-
vides a signal to the Powertrain Control Module
(PCM).
8W - 40 INSTRUMENT CLUSTER
8W-40 INSTRUMENT CLUSTER
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and 3–spd automatic
INDEX
INSTRUMENT CLUSTER . . . . . . . . . . . . . . . . . . 7
KEY-IN CHIME . . . . . . . . . . . . . . . . . . . . . . . . . . 8
LOW FUEL LAMP . . . . . . . . . . . . . . . . . . . . . . . . 8
LOW OIL PRESSURE LAMP . . . . . . . . . . . . . . . . 8
ODOMETER . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
RIGHT AND LEFT TURN SIGNAL INDICATORS . 9
SEAT BELT WARNING INDICATOR . . . . . . . . . . . 8
SERVICE ENGINE SOON LAMP . . . . . . . . . . . . . 8
SPEEDOMETER . . . . . . . . . . . . . . . . . . . . . . . . . 7
TACHOMETER . . . . . . . . . . . . . . . . . . . . . . . . . . 7
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.
HIGH SPEED WARNING MODULE
Power for the high speed warning module is sup-
plied from two circuits. One is the M1 circuit, which
is the Ignition-Off Draw (IOD) circuit. This circuit is
protected by a 10 amp fuse located in the Power Dis-
tribution Center (PDC).
Power is also supplied to the module on circuit
F20. This circuit is HOT in the RUN position only
and protected by a 10 amp fuse located in the fuse
block.
Ground for the module is supplied on circuit Z1
which terminates at the instrument panel left center
support.
Vehicle speed input is provided on circuit G7.
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.
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