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81-8
METER ASSEMBLY
(Refer to Section 201 for photographs.)
Component
Photo No.
Ambient Sensor
Top left front of radiator bracket
2
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Dash Fuse Box
Behind left dash side trim panel
55
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Engine or Powertrain Control
Module (ECM or PCM)
Right side of engine compartment
60
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Fuse/Relay Box
Right side of engine compartment, on inner fender panel
41
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Taillight Relay
In fuse/relay box
35
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Thermo Unit
Left front of engine
22
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Connector
B-12 (16-WHT)
Below I/P, right of steering column
58
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C-9 (2-BRN)
Top left front of radiator bracket
2
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H-5 (16-GRN)
Left side of engine compartment
33
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H-7 (20-BRN/WHT)
Below I/P, above left dash side trim panel, on bracket
69
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H-9 (20-BLK)
Below I/P, above left dash side trim panel, on bracket
70
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H-12 (20-WHT)
Below I/P, above right dash side trim panel, on bracket
100
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H-16 (22-WHT)
Behind right dash side trim panel
120
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H-21 (8-WHT)
Below I/P, above right dash side trim panel, on bracket
100
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H-24 (18-YEL)
Below I/P, above left dash side trim panel, on bracket
70
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H-25 (22-BLU)
Below I/P, above left dash side trim panel, on bracket
71
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H-48 (16-BLK)
Behind right dash side trim panel
120
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I-9 (30-GRN)
On left top of meter assembly
53
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I-10 (22-GRN)
On right top of meter assembly
53
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L-5 (6-WHT)
Above multi-meter
26
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Ground
B-1
Above right dash side trim panel
116
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B-2
Above right dash side trim panel
116
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B-19
Behind top of left dash side trim panel
71
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C-39
Right rear corner of engine compartment, on inner fender panel
45
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Component Location Index
81-9
METER ASSEMBLY
Engine Coolant Temperature Gauge
The engine coolant temperature gauge consists of two
intersecting coils wound around a permanent magnet
rotor. When voltage from fuse C-10 is applied to the
coils, a magnetic field is generated. This causes the ro-
tor to rotate and the gauge needle to move. The mag-
netic field is controlled by the thermo unit. As the resis-
tance in the thermo unit varies, current through the
gauge coils changes. The gauge needle moves accord-
ing to the changing magnetic field.
Tachometer
The tachometer displays engine speed in RPM. Volt-
age pulses are taken from the ignition system and sent
to the tachometer. The tachometer responds to the fre-
quency of the voltage pulses, which increases with en-
gine speed. Solid-state circuits process these pulses
into a signal that causes the gauge needle to move.
Oil Pressure Gauge (S Model)
The oil pressure gauge consists of two intersecting
coils wound around a permanent magnet rotor (see en-
gine coolant temperature gauge for operation).
Voltmeter (S Model)
The voltmeter measures the voltage through fuse C-10
when the starter switch is in ON or START.
Indicators
The indicator lights are controlled by different condi-
tions in their associated systems. See the associated
system for the indicator light circuit description.
Bulb Check
With the starter switch in ON or START, battery voltage
is applied to the “BRAKE” warning and charge warning
lights. The generator will provide ground to the circuit
until the engine is running. The lights go on to test the
light bulbs and then go off after the engine is started.
Circuit Operation
A/T SHIFT INDICATOR
A/T Shift Indicator Control Unit
Automatic Transmission Mode Switch
Dash Fuse Box
Fuse/Relay Box
Taillight Relay
Component Location Index
89
A/T SHIFT INDICATOR
HOT AT ALL TIMES
F-12
TAILLIGHT
15A
8
B-12
RED/BLK
1
FUSE/
RELAY
BOX
3
GRN
GRN/RED
7
B-12
GRN
Lighting
Switch
Lighting Switch Details,
Dash and Console Lights
B-19
See Ground
Distribution,
page 14-1.
SX15
SB20
COMBINATION
SWITCH
4
X-9
TAILLIGHT
RELAY
FUSE/
RELAY
BOX
2
X-9
SX4
RED/BLK
RED/BLK
1
H-12
BLK
BLK
GRN/RED
YEL
OFF
HEAD
PARK
Headlights
WHT
GRN
Anti-theft System,
Torque-on-Demand
(T.O.D.) System
GRN
Engine
Controls
GRN
BLK
Circuit Schematic
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