ELECTRICAL-BODY
AND
CHASSIS
12-26
•
Low oil
pressure
• High engine temperature
• Defective wiring
or
switch
connector from sender
in block above starter
on
and
at
left front
of
distributor
on V-8
Sending Unit Replacement
1.
Disconnect wiring harness
unit terminal (located
L-6 engines
engines).
2.
Remove sender unit using Tool J-21757
or 12
point
socket, replace with
new
unit
and
check operation.
GENERATOR INDICATOR
1.
Ignition
on,
Engine
not
Running
and
Telltale Light
Off.
• Indicator bulb burned out, replace bulb.
• Open circuit
or
loose connection
in the
telltale
light circuit.
2.
telltale Light Stays
on
after Engine
is
Started.
If indicator light does
not go out at
engine idle
speed, refer
to
Charging Systems under Engine
Electrical, Section
6Y.
TEMPERATURE (COOLING SYSTEM) INDICATOR
The temperature indicator circuit consists
of two re-
motely located units, indicator gauge
and
engine sender
unit.
The
indicator gauge, located
in the
instrument
panel, consists
of a
red light which will indicate
an
over-
heated engine condition.
Engine Sender Unit Replacement
1.
Drain engine cooling system
to a
level below unit.
2.
Remove sender unit (located
in the
inlet manifold
near water pump housing
on V-8
engines and
in the
cylinder head near
an
exhaust port
oh L-6
engines)
and replace with new unit.
3.
Refill cooling system
and
check operation
of
unit.
CHEVELLE INSTRUMENTS AND GAUGES
INDEX
Page
General Description
* *
i2-26
Service Operations
12-26
Instrument Panel
12-26
Instrument Cluster.
12-26
Fuel Gauge and/or Ammeter
12-27
Clock,
i 12-27
Speedometer
12-27
Page
Speedometer Cable
.
. 12-27
Temperature Gauge
12-29
Oil Pressure Gauge
12-29
Indicator Lights.
. 12-29
Oil Pressure Indicator
12-29
Generator Indicator
. . 12-29
• Temperature Indicator
12-29
GENERAL DESCRIPTION
The Chevelle instrument cluster assembly consists
of:
a speedometer;
a
fuel gauge;
a
generator,
an
engine
tem-
perature and an
oil
pressure indicator lamp, and includes
a clock
on
deluxe models.
On
super sport models,
am-
meter, coolant temperature
and oil
pressure gauges
re-
place
the
appropriate indicator lights. Except
for the
speedometer,
all of the
indicator lamps, instruments
and
gauges
of
these clusters may
be
serviced without remov-
ing
the
instrument cluster assembly from
the
vehicle.
In addition
to the
instrument indicator lamps,
a
brake
warning lamp
is
included
in the
cluster
as
standard
equipment.
The
indicator
is
connected
to the
parking
brake
and
brake pressure differential switches
and
serves
a
dual function.
It
lights when the parking brake
is applied
and
also when
the
brake pedal
is
applied,
if a
malfunction should occur
in the
brake system
due to a
loss
of
hydraulic pressure. Servicing
of the
hydraulic
pressure differential switch
is
covered
in
Section
5 of
this manual.
Regular maintenance
is not
required on the instrument
cjLuster
or its
components other than maintaining dean
and tight electrical connections, replacing defective parts
and keeping
the
speedometer cable properly lubricated.
SERVICE OPERATIONS
INSTRUMENT PANEL ASSEMBLY
INSTRUMENT CLUSTER (Figs.
41
thru
44)
Removal
1.
Disconnect battery ground cable.
2.
Remove steering coupling bolt and disconnect steer-
ing shaft from coupling.
3.
Loosen mast jacket lower clamp.
4.
Remove
air
conditioning center distributor duct
(if
so equipped).
5. Remove radio rear support bracket screw.
6. Remove mast jacket upper support clamp and retain-
ing bolts from lower support (refer
to
Section
9,
Steering).
CAUTION: Cover mast jacket
and
parl
brake handle with
a
suitable material
to
prevc
scratching.
7.
Disconnect speedometer cable
at
rear
of
cluster
housing
and
speed warning control knob
at
panel
(if
so equipped).
8. Remove instrument panel retaining screws (nine
upper and five lower).
.
9. Working under the console remove four lower retain-
ing screws from instrument cluster housing.
10.
Pull instrument panel assembly from console and
lay
forward on mast jacket.
11.
Disconnect wiring harness, cluster lamps and wiring
CHEVROLET CHASSIS SERVICE MANUAL
ELECTRICAL-BODY
AND
CHASSIS
12-31
CHEVY II INSTRUMENTS AND GAUGES
INDEX
Page
Page
General Description -.....
12-31
Service Operations.
12-31
Instrument Panel
. 12-31
Instrument Cluster
12-31
Fuel Gauge
12-32
12-32
Clock,
Speedometer
12-34
Speedometer Catte
12-34
Indicator Lights
12-34
Oil Pressure Indicator
12-34
Generator Indicator
12-34
Temperature Indicator
12-34
GENERAL DESCRIPTION
The Chevy
n
instrument cluster assembly consists
of:
a speedometer;
a
fuel gauge;
a
generator, temperature
and
oil
pressure indicator lamps, and includes
a
clock
on
deluxe models. Except
for the
speedometer,
all of the
cluster lamps, instruments and gauges
of
the cluster
may
be serviced without removing
the
instrument cluster
as-
sembly from
the
console.
In addition
to the
instrument indicator lamps,
a
brake
warning lamp
is
included
in the
cluster
as
standard
equipment.
The
indicator
is
connected
to
thfc parking
brake and brake pressure differential switches andserves
a dual function.
It
lights when
the
parking brake
is ap-
plied
and
also when
the
brake pedal
is
applied,
if a mal-
function should occur
in the
brake system
due to a
loss
of
hydraulic pressure. Servicing
of the
hydraulic pressure
differential switch
is
covered
in
Section
5 of
this manaul.
Regular maintenance
is not
required on
the
instrument
cluster
or its
components other than r^Mfitftl^i^g clean
and tight electrical connections, replacing defective parts
and keeping
the
speedometer cable properly lubricated.
SERVICE OPERATIONS
INSTRUMENT PANEL
INSTRUMENT CLUSTER
Removal
and
Installation {Figs.
45
thru
48)
1.
Disconnect battery ground cable.
2.
Remove mast jacket upper support clamp (refer
to
Steering, Section
9, for
complete procedure
on low-
ering jacket) and lower steering column.
NOTE:
Apply protective material
to the
mast
jacket
to
prevent damage
to the
painted surfaces.
3.
Disconnect retaining collar securing speedometer
cable
to
speedometer head.
4.
Remove screws retaining cluster
to
console.
5. Pull cluster forward
of
console opening and discon-
nect
all
wiring
and
lamp connections. Remove
cluster from vehicle.
CAUTION:
Do not
pull cluster outward further
than slack
in
wiring harness will allow, other-
Fig.
45-
Instrument Cluster Installation
—
Chevy
II
Fig.
46 -
Speed Warning Device
CHEVtOtET CHASSIS SERVICE MANUAL
