Lighting and Horns: Description and Operation

DIAGNOSTIC PROCEDURES
When a vehicle experiences problems with the headlamp system, verify the condition of the battery connections, fuses, charging system, headlamp bulbs, wire connectors, relay, high beam switch, dimmer switch, and headlamp switch.

DAYTIME RUNNING LAMP MODULE
PL vehicles built for use in Canada are equipped with a Daytime Running Lamp (DRL) system. Turn signal lamp circuitry always comes from the multi-function switch, and goes to the cluster connector, into the cluster, then back out to the front turn signal switch lamps. The Canadian cluster provides steady illumination of the front turn signal when the ignition switch is in the ON position. The DRL function may be inhibited by activating the turn signals, the hazard flashers, the headlamp switch, or park brake.

BULB
The electric light bulb is a source of electromagnetic radiation which generates light. Vehicles use many different types of bulbs:
- Headlamp bulb
- Fog Lamp bulb
- Tail Lamp bulb
- Stop Lamp bulb
- Turn Signal bulb
- Back up Lamp bulb
- Dome Lamp bulb
- Transaxle Range Indicator Lamp bulb (PRNDL)
- Glove Box Lamp bulb
- Floor Console Lamp bulb
- Rear Cargo Lamp bulb
- Visor Vanity Lamp bulb
- Underhood Lamp bulb
- etc.

LAMP ASSEMBLIES
The lamp assemblies or modules generally consist of a housing, reflector(s) and lens that directs a light source. Vehicles use many different types of lamps:
- Headlamp
- Fog Lamp
- Tail Lamp
- Stop Lamp
- Turn Signal Lamp
- Back up Lamp
- Dome Lamp
- Transaxle Range Indicator Lamp (PRNDL)
- Glove Box Lamp
- Floor Console Lamp
- Rear Cargo Lamp
- Visor Vanity Lamp
- Underhood Lamp
- etc.