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Sec. 7
Page 136
GM COACH MAINTENANCE MANUAL
LIGHTING SYSTEM
illuminate the arrow shaft. The arrow shaft bulbs
remain
illuminated
constantly
with directional
switch in turn position; the arrow head bulb is
connected through a flasher so light flashes on
and off until turn is completed.
Front and .rear directional light bulbs are ac-
cessible after removing four screws attaching lens
retainer to light body and removing retainer, gas-
ket, and lens.
Make sure gasket is in good con-
dition and properly positioned when reinstalling
lens.
HIGHWAY (TARGET) SIGN LIGHTS
Eight bulbs, illuminating highway sign at rear
of vehicle, are controlled by "MARK" switch on
switch panel.
Light bulbs are accessible at inner
side of engine compartment door after door is
opened.
LICENSE PLATE LIGHT
License plate light, mounted directly over li-
cense plate holder at left rear corner of vehicle,
is controlled by "MARK" switch on switch panel.
Bulb is accessible for replacement by removing
light cover, cap, and glass which are attached by
two screws.
DESTINATION SIGN LIGHTS
Three bulbs, mounted behind destination sign
curtain, provide illumination for destination sign.
Lights are controlled by "SIGN" switch on switch
panel. Refer to "Coach Lighting Wiring Diagram''
in back of manual for wiring circuits.
Bulbs are
accessible for replacement from inside vehicle
under windshield ledge.
SPOT LIGHT
Spot light is mounted through front corner post
at left of windshield.
Beam is directed by handle,
which also contains the light switch, from inside
vehicle. Spot light circuit is protected by number
7 circuit breaker on panel at left of driver.
Spot
lighL is equipped with Sealed-Beam unit.
To replace Sealed-Beam unit, remove screw
attaching ornament to bottom of light body and re-
move ornament.
Loosen clamp ring screw and re-
move ring and lens.
Remove Sealed-Beam unit
from light body and disconnect wires from back
of unit. Install new Sealed-Beam unit by reversing
the above procedure.
INTERIOR LIGHTING EQUIPMENT
GAUGE PANEL LIGHTS
Gauges in gauge panel in front of driver are
illuminated when "MARK" switch on switch panel
is turned on.
Light bulbs are accessible by pulling bulb sock-
et free from back of panel. Bulb can then be re-
moved from socket. After replacing bulb, press
socket firmly into holder in back of panel.
STEPWELL LIGHTS
Front entrance door stepwell is illuminated by
two lights, one mounted on body inside front panel
and the other at right front seat floor overhang.
Light circuit, protected by number 8 circuit break-
er on panel at left of driver, is energized when
"STEP" switch on switch panel is turned on; cir-
cuit is further controlled by a switch which is ac-
tuated by the door control linkage.
Lights operate
only when "STEP" switch is turned on and front
door is open.
To replace bulb in light mounted on body panel,
remove lens and retainer which are attached to
light body with three screws.
Light bulb at right
front seat floor overhang is not covered.
GENERAL (DOME) LIGHTS
General interior lights are mounted on package
rack support (ten each side), and are controlled
by top left-hand switch on switch panel.
With
switch in "GENERAL" position, circuit through
general light relay coil is energized. Relay points
then close and complete circuit to lights. Circuit
through switch to relay coil is protected by number
12 circuit breaker, and circuit through relay to
lights is protected by number 24 circuit breaker.
Refer to "Coach Lighting Wiring Diagram" in back
of manual.
Maintenance and adjustment of relay
are described under "Relays" in "WIRING AND
MISCELLANEOUS ELECTRICAL" Section.
Remove screws attaching lens and retainer to
body to gain access to bulbs.
READING LIGHTS
Reading lights are mounted in under side of
package racks (ten each side and one above rear
lounge seat), and are controlled by top left-hand
switch on switch panel. When switch is in "READ-
ING" position, circuit through reading light relay
coil is energized.
Relay points then close and
complete
circuit to reading lights.
Individual
switches at each light then permit passenger con-
trol of lights.
Refer to "Coach Lighting Wiring
Diagram" in back of manual.
Each light has two bulbs and two switches, ex-
cept rear lounge light which has only one bulb.
To replace bulbs in reading lights, pry lens re-
tainer off light body, using screw driver in notch
in retainer on side away from aisle.
To replace
bulb in rear lounge light, remove screw from one
end of door and swing hinged door downward.
AISLE LIGHTS
Three light bulbs are mounted on seat floor
overhang at sides of aisle, two on left side and
one on right side.
Lights are controlled by switch
on panel marked "AISLE." Bulbs are not covered.
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