Cadillac 60 Series 1963 Shop Manual page 323

12-42
ELECTRICAL SYSTEM
2. Install gage unit in fuel tank and install
mounting screws, securing tank unit ground wire
under head of one screw.
3. Connect fuel gage wire.
4. Install fuel tank as described in Section 10,
Note lib.
57. Fuel or Temperature Gage
Removal
1. Remove upper instrument panel cover as
described in Section 15, Note la.
2. Disconnect cluster connectors.
3. Remove four screws retaining fuel and tem-
perature gage assembly to back of cluster and
remove assembly.
58. Temperature Gage Service
Some difficulties with the temperature gage
system may be due to the thermogage unit on the
engine, not the gage on the instrument panel.
When checking either unit, however, a definite
series of tests should be employed to determine
the exact nature of the difficulty and what should
be done to repair it.
To check engine thermogage unit:
1. Disconnect wire to thermogage unit at the
engine.
2. Connect a test light consisting of a three-
candle-power bulb and a pair of test leads in cir-
cuit by clipping one lead to battery terminal on
starter and other lead to terminal of thermogage
unit. Test bulb should not light. If it does light
when connected in this manner, thermogage is
shorted and should be replaced.
3. Remove test lead from gage terminal and
touch it to body of unit. Bulb will light if unit is
grounded properly. If it does not light, check for
presence of sealing compound around threads of
unit. Remove compound and repeat test.
NOTE: Never use any sealing compound on
thermogage unit to stop water leaks. If tighten-
ing unit does not stop leakage, it should be
replaced.
4. Remove test light and install dash gage wire
on thermogage unit if it tests satisfactorily.
Check following items according to nature of
difficulty:
a. If dash unit does not register when ignition
switch is turned on and engine is warm, it may be
caused by a break in the line between dash unit
and the ignition switch.
b. If gage shows "High Temperature" under all
conditions, it may be caused by the left coil wire
in dash unit being broken, poor dash unit ground,
or the wire leading from dash unit to engine unit
may be shorted to ground.
c. If gage registers "Low Temperature" under
all conditions, the lead to engine unit or the right
coil wire in dash unit may be broken.
59. Speedometer Head Assembly
Removal and Installation
a. Removal
1. Remove instrument cluster as described in
Section 15, Note 4a.
2. Remove eight clips that secure cluster lens
and retainer to cluster casting. Use caution not
to mar lens.
3. Remove two screws that attach shift indica-
tor housing and dial.
4. Remove three screws and attached grommets
on back of casing that retain speedometer head
assembly and lift assembly from casing.
b. Installation
1. Position speedometer assembly on back of
casing and secure with three screws and attached
grommets.
2. Secure shift indicator housing and dial with
two screws,
3. Position cluster lens and retainer to cluster
casting and secure eight clips.
4. Install instrument cluster as described in
Section 15, Note 4b.
60. Speedometer Head Assembly
Disassembly and Assembly
a. Disassembly
1. Remove speedometer head as described in
Note 59a.
2. Carefully remove white painted aluminum
pointer assembly (press fit). Turn against zero
stop and lightly lift pointer at hub position.
3. Remove speedometer dial by removing the
two holding screws.
4. Remove season odometer retaining plate and
screw. Lift out season odometer.
5. Remove trip odometer retaining plate and
screw. Lift out trip odometer.