Chevrolet 10 Series 1967, Service Manual

Page: 521 / 605

ELECTRICAL—BODY AND CHASSIS 12-21
AIR PRESSURE GAUGE REPLACEMENT
40-60 Conventional Cab Models
1. Remove instrument cluster assembly as previously
described in this section.
2. Remove rear cover retaining screws, cover and
gauge assembly from cluster housing.
3. Remove pipe fitting and retaining nut and remove
gauge unit from cover.
4. To install, reverse removal procedure and check
operation of unit.
Flatface Cowl and Tilt Cab Models
1
. Unsnap socket and bulb from top of gauge housing.
2. Disconnect air pipe at rear of gauge.
3. Remove two attaching nuts, washers and clamp. Pull
gauge from opening in instrument panel.
4. To install, reverse removal procedure and check
operation of unit.
DIRECTIONAL SIGNAL CONTROL
The 1967 directional signal switch is an electrically
operated self-contained unit which incorporates the can­
celling mechanism, the hazard warning switch and the
lane changing signal. The switch is one complete plastic
assembly and is serviced as a unit except for the spring
detent, yoke assembly and cancelling springs.
The hazard warning circuit is activated by a push-pull
switch which is located on the right side of the mast
jacket, opposite the directional signal lever.
The lane changing circuit is activated by holding the
directional signal lever in the first detent position; there
is no lock-in or cancelling device in this position.
On Tilt Cab models and on P20 and P30 models the
hazard warning switch and the lane changing signal are
not incorporated in the directional signal switch, but
there is a separate hazard warning switch on the instru­
ment panel.
DIRECTIONAL SIGNAL SWITCH REPLACEMENT
10-60 Conventional Cab, Chevy Van and P-10
(Fig. 25)
1. Disconnect battery ground cable.
2. Remove steering wheel assembly (Refer to Steering,
Section 9), preload spring and cancelling cam.
3. Remove shift lever roll pin and shift lever (if
applicable).
4. Remove directional signal lever retaining screw and
lever.
5. Push in hazard warning knob, remove retaining
screw and knob.
NOTE:
Hazard switch knob must be pushed in
to prevent damage to switch when removing
from switch cover.
6
. Disconnect switch wiring from chassis harness at
multiple connector under instrument panel.
NOTE: On 40-60 Models, remove wire term i­
nals from multiple connector.
7. Remove mast jacket upper bracket.
8
. Remove switch wiring cover from column.
9. Remove switch mounting screws and remove switch,
bearing housing, switch cover and shift housing from
column.
10. To install, reverse removal procedure.
Tilt Cab Models and P20, 30 Models
1. Remove steering wheel (Refer to Section 9, Steering).
2. Disconnect signal wiring at chassis harness, discon­
nect directional signal wiring leads from multiple
connector.
NOTE: Mark location of each wire in
connector.
3. Disconnect wiring harness retaining clips.
4. Remove directional signal lever attaching screw and
lever.
5.
Remove three screws attaching directional signal
control assembly to signal housing.
6
. Remove directional signal assembly and housing
from steering column.
7. Remove upper shaft bearing and horn wire from
directional signal assembly.
8
. To install, reverse removal procedure and check
operation of unit.
CHEVROLET TRUCK SERVICE M ANUAL