automotive lighting systems. question # 1 how many light bulbs are on a modern vehicle? taillights...
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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 RatingsTrade Design Design WattageName 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