Chevrolet 30 Series 1967 Service Manual page 501

ELECTRICAL-BODY AND CHASSIS
...........................................
General Description
Maintenance and Adjustments........................
Headlamp A d ju s tm e n t.............................. ...............
...........................................
Service O p e ra t io n s
Sealed Beam Unit R e p lacem en t
Parking Lamp R eplacem en t..................... ...............
Rear Lighting ..........................................
The lighting system includes the main light switch; stop
light, dimmer and backing lamp switches; head and park­
ing lamps; stop, tail and directional signal lamps; instru­
ment illumination and indicator lamps; and the necessary
wiring to complete the various circuits. A bulk head fuse
panel (fig. ) provides convenient power take offs and fuse
1
clips for the appropriate circuits.
harness and forward lamp harness connectors are bolted
to the fuse panel.
Maintenance of the lighting units and wiring system
consists of an occasional check to see that all wiring
connections are tight and clean, that the lighting units are
tightly mounted to provide good ground and that the head­
lamps are properly adjusted.
SECTION 12
CONTENTS OF THIS SECTION
Lighting System.................................................................. 12-1
Instruments and G a u g e s ................................................... 12-11
Directional S ig n a ls ............................................................ 12-21
Windshield Wipers and W a s h e r s ....................................... 12-24
Wiring D ia g ra m s ............................................................... 12-30
LIGHTING SYSTEM
Page
............... 12-1
12-3
............... 12-5
................. .................
12-5
12-5
............... 12-5
GENERAL DESCRIPTION
The engine wiring
MAINTENANCE AND ADJUSTMENTS
Loose or corroded connec­
INDEX
Directional Signal Lamps
Wiper Switch Replacem ent........................... ............ 12-8
Light Switch R ep lacem en t........................... ............ 12-8
Stoplamp Switch R ep lacem en t
Dimmer Switch Replacement
Neutral Safety Switch Replacement
Backing Lamp Switch Replacement. . . . . .
All wiring systems incorporate a fusible link which
provides increased overload protection to all electrical
circuits, except the starting motor circuit, not protected
by fuses. Composite wiring diagrams (figs. 40 thru 76)
are included at the end of this section. The standardized
color code is common to all wiring harnesses. Under
this color code, the color of the wire designates a partic-
lar circuit. The harness title indicates the type of har­
ness, single or multiple wire, and also describes the
location of the harness.
tions may cause a discharged battery, difficult starting,
dim lights, and possible damage to generator and regula­
tor. Wire harnesses must be replaced if insulation be­
comes burned, cracked, or deteriorated. Whenever it is
necessary to splice a wire or repair one that is broken,
Page
........................... ............ 12-5
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............ 12-8
. . . . .
............ 12-9
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CHEVROLET TRUCK SERVICE MANUAL
Page
12-8
12-10