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Unit14LightingSystemServiceProcedures14.1LightingSystem14.2Buick(2007,EngineType:V6,3.9L)RepairManual14.1LightingSystemAutomotivelampassemblyisthebasiccomponentofthegrouplighting,whichcomprisesthreeparts:light(bulb),themirrorrefilectorandlighttransmittance.Automotivelampswithdifferentfunctionscanbedividedintotwocategories:lightingandsignallamps.Lightingincludesheadlamp(lowbeamsandhighbeams),thefore-fog-lamps,reversinglightandsidemarkerlight;signallightsincludelocationlights,turnsignal,brakelights,therear-fog-lamps,licenseplatelampandretro-refilector.下一页返回14.1.1HeadlampsHeadlamps,commonlyknownastheheadlightsandloadedwithdifferentlightsources,canbedividedintogaslamps(gasdischargelamps)andelectriclamps(filamentlamps).TherearealsoincandescentlightsandHalogenTungstenLamps.Atpresent,Chinamainlyusesthelightbulb,includingnearlightheadlampsandhighbeams.返回上一页14.1LightingSystem下一页返回下一页上一页14.1LightingSystem14.1.2FogLampsFoglampsareusedmainlyinconditionoffog,snow,rainordust.Topreventoncomingvehicledrivers'dazzling,theprojectiondistanceoffoglampsbeamisneareronthegroundrelativetothelowbeam.返回上一页14.1LightingSystem14.1.3OtherLampsLightingandsignallampsinstalledinthevehiclesfollowsomeprinciples:Theaxisoflampsshouldbeparalleltotheground;sidereflectorlightsandlateralbenchmarkaxisareperpendiculartotheplaneoftheverticalcenterofvehicles;otherlampsbenchmarkaxisshouldbeparalleltotheplane(Figure14-1).下一页返回14.2Buick(2007,EngineType:V6,3.9L)RepairManual14.2.1HeadlampBulbReplacementRemoval:Removetheheadlampassembly,asisshowninFigure14-2.Turnthehigh/lowbeambulbsocketcounterclockwisetoremove.下一页返回上一页Installation:Turnthehigh/lowbeambulbsocketclockwisetoinstall.Installtheheadlampassembly.HeadlampAssembly(Park,Turn,CorneringandSideMarkerLamps,Figure14-3)14.2Buick(2007,EngineType:V6,3.9L)RepairManual下一页返回上一页14.2.2DomeLamp(Figure14-4)Removal:Removethedomelamplensfromthedomelamp.Removethemountingscrewandremovethedomelampfromtheheadliner.Installation:Installandsecurethedomelamptotheheadlinerwiththemountingscrew.Installthedomelamplensonthedomelamp.14.2Buick(2007,EngineType:V6,3.9L)RepairManual下一页返回上一页14.2.3HighMountedStopLampAssembly(Figure14-5)Removal:Removethemountingscrewsfromthehigh-mountedstoplamp.Removethehigh-mountedstoplampfromthetailgatedoor.Disconnecttheelectricalharnessconnector.14.2Buick(2007,EngineType:V6,3.9L)RepairManual下一页返回上一页Installation:Connecttheharnesselectricalconnectortothehigh-mountedstoplamp.Installandsecurethehigh-mountedstoplamptothetailgatedoorwiththemountingscrews.14.2Buick(2007,EngineType:V6,3.9L)RepairManual下一页返回上一页14.2Buick(2007,EngineType:V6,3.9L)RepairManual14.2.4TaillightAssembly(Figure14-6)Removal:Openthetailgate.Removethemountingscrewsfromthetaillightassembly.Pullthetaillightassemblyrearwardtoreleasetheretainersfromthebodypanel.Disconnecttheharnesselectricalconnector.Removethebulbsocketsbypressingthelocktabdownandturningthesocketscounterclockwise.返回Installation:Installthebulbsocketsbyturningthesocketsclockwiseuntilthelocktabengages.Connecttheharnesselectricalconnector.Positionthetaillightretainerstoalignwiththebodypanel.Seatthetaillightintothebodycavity.Installandsecurethetaillampmountingscrews.Closethetailgate.下一页上一页14.2Buick(2007,EngineType:V6,3.9L)RepairManual返回14.2.5LicensePlateLight(Figure14-7)Removal:Removethemountingscrewsfromthelicenselightlens.Removethelicenselightlensfromthetailgate.Removethebulbfromthelicenselightsocket.Installation:Insertthebulbintothesocket.Installandsecurethelicenselightlensonthetailgatewiththemountingscrews.上一页14.2Buick(2007,EngineType:V6,3.9L)RepairManualFig14-1Typicalcircuitdiagr

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