AUTOMOTIVE LIGHTING SYSTEMS

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AUTOMOTIVE LIGHTING SYSTEMS
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Question 1

• How many light bulbs are on a modern vehicle?
• Taillights 8
• Front 6
• Side - 4
• Interior 15
• IP Controls 22 24
• Total - 56

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Lamps

• Double and single tungsten filaments
• Filament is in a vacuum

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Lamp Ratings

• Trade Design Design Wattage
• Name Voltage Amperage

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Types of Headlights

• Sealed Beam Used between 1939 1975
• Halogen Bulb filled with halogen, Burns hotter,
  lasts longer
• Composite fixed housing with replaceable bulb
• HID High Intensity Discharge Light emitted by
  a spark

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HID

• Brighter
• Wider deeper field of vision
• Use 37 less power
• Last up to 100,00 miles
• As compared to Halogen bulbs

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HID

• Separate Ballast produces 80v
• Ark tube (bulb) filled with Xenon gas
• Electrons excite salts in Xenon gas creating the
  ark which produces light

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Headlight Switches

• Controls driving, parking and IP illumination
  (dimming)
• Locations On dash or steering column
• Separate switch for high beam activation

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Low Beam Circuit
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High Beam Circuit
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Exterior Lighting

• Taillights Contain parking, brake, turn
  signals, backup, license plate lights
• Can be housed in one unit or in several units
• Incandescence bulbs or LED
• Separate 3rd brake light asm. - CHMSL
• Side Markers Part of parking lights circuit,
  makes vehicle visible from the side
• Fog Lights Can be clear or yellow, factory or
  aftermarket, controlled by separate switch

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Interior Lighting

• Courtesy Lights Trunk, glove box, under hood,
  roof floor lighting
• Ip Panel Lighting Illuminate gauges and
  controls with dimmable lighting