Pontiac tempest 1968 Service Manual page 634

CHASSIS E L E C T R I C A L SERVICE
12-13
12. If car is equipped with multiplex disconnect
multiplex unit.
13. Disconnect speedometer.
14. Pull instrument panel plate forward.
CAUTION: Make sure all wires and routing clips
are loose enough to allow panel to come forward.
15. Disconnect w i r e s attaching to instrument
cluster.
16. Remove four n u t s t h a t retain instrument
cluster to instrument panel trim plate.
17. Remove cluster.
18. Replace by reversing above procedure.
TEMPEST
1. Disconnect battery (Fig. 12-23).
2. Remove instrument panel fore pad.
3. Disconnect speedometer cable, main wire and
switch connectors.
4. Remove instrument panel trim panel retaining
screws and disconnect heater control.
5. Remove mast jacket upper retaining screws,
lower column and remove trim panel.
6. Remove cluster retaining screws, then cluster.
7. To replace, reverse removal procedure.
FIREBIRD
1. Disconnect battery ground cable (Fig. 12-24).
2. Remove mast jacket lower support screws at
toe pan.
3. Remove mast jacket upper support bolts and
allow steering wheel to rest on seat cushion.
CAUTION: Both supports must be detached to
prevent distortion of mast jacket.
4. Remove attaching screws from face of panel
and partially remove cluster from console opening.
5. Reach behind cluster and disconnect speedom­
eter cable, speed warning device (if so equipped -
Fig. 12-28) and chassis harness connector at rear of
panel.
6. Remove cluster from console opening.
7. To install, reverse removal procedure.
SPEEDOMETER CABLE
1. Disconnect speedometer c a b l e casing from
speedometer head.
2. Slide old cable out from upper end of casing,
or if broken from both ends of casing.
3. Take short piece of speedometer cable with a
tip to fit speedometer and insert it in speedometer
socket. Spin short cable between fingers in direction
that higher speed is indicated on speedometer dial
and note if there is any tendency to bind. If binding
Is noted, there is trouble inside head and speed­
ometer should be repaired.
4. Inspect cable casing, especially at transmis­
sion end, for sharp bends and breaks. If breaks
are noted, replace casing.
5. To insure quiet cable operation, apply suitable
speedometer cable lubricant on lower two-thirds of
cable and assemble in casing in following manner:
a. Wipe cable clean, using lint free cloth. Flush
bore of casing with oleum spirits or suitable sol­
vent solution and blow dry with air under pressure.
b. Place some suitable speedometer cable lub­
ricant in palm of hand.
c. Feed cable through lubricant in hand and
into casing until lubricant has been applied to
lower two-thirds of cable. Do not over-lubricate
and do not apply lubricant to upper third of cable,
since operation of cable assures adequate lubri­
cation of upper third and at same time prevents
lubricant from seeping into speedometer head.
6. Seat upper cable tip in speedometer and tighten
casing connector to speedometer case as tightly as
possible with fingers.
NOTE: Insufficient tightening of connector will
result in connector loosening, causing speedometer
indicator to waver.
PRINTED CIRCUIT-TEMPEST OR FIREBIRD
1. Remove instrument cluster.
2. Remove all cluster illuminating and indicator
lamps from housing (Fig. 12-23 and 24).
3. Remove fuel gauge terminal nuts securing
printed circuit to housing.
4. Remove hex head screws retaining printed c i r ­
cuit to the cluster housing and remove circuit from
housing.
5. To install, reverse removal procedure.