Figure 6-95.--Commonly used light bulbs.
switch is in any of the ON positions. Many vehicles are
The bulbs (lamps) used in these lights are generally
equipped with an instrument panel light switch so that
single contact, single filament; also used are
the instrument panel lights can be dimmed or turned off
double-contact, double-filament bulbs (fig. 6-95). Both
types are provided with nibs to lock into bayonet
sockets. Always replace a light bulb with one of the
same type. If there is any doubt as to the type to be used,
refer to the applicable maintenance manual to obtain
The smaller lights used for parking are sometimes
the correct type.
located immediately above or below the main
headlights. Side lights sometimes serve as parking
lights. The parking light switch is incorporated into the
main light switch.
Ordinarily, indirect lighting is used for the
instrument lights, which are on whenever the light
Figure 6-96.--Rear marker and blackout driving lights.