Automotive Electrical and Electronic Systems Classroom Manual Fifth Edition Update by John F. Kershaw

278 Chapter Twelve
Figure 12-47.
Multistrand wiring can be used behind the instrument panel. (GM Service and Parts Operations)
Figure 12-49. The rheostat may be a separate unit in
the panel lamp circuit. (DaimlerChrysler Corporation)
Figure 12-48. The panel lamps receive current
through the main headlamp switch, which may also
contain a rheostat to control the current. (DaimlerChrysler
Corporation)
Interior Lamps
Interior (courtesy) lamps light the interior of the car
for the convenience of the driver and passengers.
Circuit diagram
Interior lamps receive current from the battery
through the fuse panel. Switches at the doors
control this current and light the lamps when one
of the doors is opened. Many manufacturers
install the bulbs between the power source and
the grounded switch (Figure 12-50). Others,
including Ford and Chrysler, install the switches
between the power source and the grounded bulb
(Figure 12-51).