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Chapter Twelve
Figure 12-31. A taillamp, license plate lamp, and parking lamp circuit diagram. (GM Service and Parts Operations)
Switches and Fuses These lamps are controlled by contacts within the main headlamp switch. They can be lit when the headlamps are off (Figure 12-32). A fuse (usually 20 amperes) protects the circuit.
Bulbs The bulb designs most commonly used as taillamps and parking lamps are the G-6 single-contact bayonet and the S-8 double-contact bayonet. The tail and parking lamps may each be one filament of a double-filament bulb. License plate lamps are usually G-6 single-contact bayonet or T-3 1/4-wedge bulbs.
STOP LAMP AND TURN SIGNAL CIRCUITS Stop lamps, also called brake lamps, are always red. Federal law requires a red center highmounted stop lamp (CHMSL), on 1986 and later
Figure 12-32. Contacts in the main headlamp switch provide current to the taillamps, license plate lamps, and parking lamps. (DaimlerChrysler Corporation)
