GILLIG LOW FLOOR, Руководство по обслуживанию

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4
Electrical System
TEST
EXTERIOR
LAMPS TEST
Figure 9-52, Exterior
Lamps Test Switch
ExTERIOR LIGHTING EqUIPMENT
Circuit diagrams for the exterior lights and their controlling switches, relays, and circuit breakers, are
shown on the applicable wiring diagrams in the Electrical Schematics Manual .
Exterior Lamps Test Switch
Mounted on the underside of the electrical component compartment (above
the driver’s side window), the Exterior Lamps Test switch uses the multiplex
system to activate every exterior lamp on the bus except for the backup lights.
This test does not check the systems which control the lamps, only the lamps
themselves. For example, the turn signal lamps may flash when the Exterior
Lamps Test switch is activated even if the turn signal switches are bad.
The Exterior Lamps Test Switch tests the condition of
the bulbs and wiring only. It does not take the place
of a thorough exterior lighting systems inspection,
with an observer outside the bus checking each lamp
as it is activated.
Headlights
The dual headlight assembly (Figure 9-53)
consists of two rectangular sealed beam
lamp units. The outboard lamps are
double filament units which consist of
an upper and lower beam unit. The
inboard lamps are single filament
units which are only used when the
outboard units are in the high beam
mode of operation. The outboard
units are identified as type 2A and
have “2A” molded into the top
of the lens. The inboard units are
identified as type 1A and have “1A”
molded into the top of the lens.
The sealed beam lens incorporates
aiming bosses into its construction,
which allows adjustment of the lamp
without having to use an aiming
screen or a large work area. Adjust-
ment can be accomplished using
headlight aiming tool J-25300-A, or
20-800-74
HIGH LOW/BEAM (2A)
RETAINER
TRIM
MOUNT
BACKING
Figure 9-53, Headlights