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LIGHTING CIRCUITSLIGHTING CIRCUITSLIGHTING CIRCUITSLIGHTING CIRCUITS
LAMPSLAMPS
Numbering System (C252)Numbering System (C252) A & B - Miniature A & B - Miniature
bayonet/instrument/indicatorbayonet/instrument/indicator C - Single contact bayonet/lic and C - Single contact bayonet/lic and
courtesycourtesy D - Double contact D - Double contact
bayonet/trunk/underhoodbayonet/trunk/underhood F - Cartridge type for dome F - Cartridge type for dome
lightslights G - Wedge base/instrumentG - Wedge base/instrument D - Double contact D - Double contact
bayonet/trunk/underhoodbayonet/trunk/underhood
BulbsBulbs
Page L300 & C252Page L300 & C252
CONTACT DESIGNCONTACT DESIGN
Single filament, single Single filament, single contactcontact
Single filament, dual Single filament, dual contactcontact
Dual Filament, dual Dual Filament, dual contactcontact
Even ProngsEven Prongs Offset ProngsOffset Prongs
Sockets must be clean and tightSockets must be clean and tight
Page Lab 328
HEADLIGHTSHEADLIGHTS
Sealed BeamSealed Beam HalogenHalogen Composite HeadlightsComposite Headlights
Vented HousingVented Housing Causes CondensationCauses Condensation
Concealed HeadlightsConcealed Headlights Vacuum controlledVacuum controlled Electrically controlledElectrically controlled
Pg C256Pg C256
SEALED BEAMSSEALED BEAMS
Pg C255Pg C255
Beam reflectsBeam reflects
Pg L309Pg L309
Adjustment mount padsAdjustment mount pads
Pg L309Pg L309
AdjustmentAdjustment Pg L309Pg L309
HALOGEN HEADLIGHTHALOGEN HEADLIGHT
Sealed HousingSealed Housing Grommet SealGrommet Seal Twist to LockTwist to Lock 25% brighter25% brighter life Spanlife Span Cleanliness when Cleanliness when
replacingreplacingPg L306Pg L306
HEADLIGHT SWITCHESHEADLIGHT SWITCHES
Headlight SwitchesHeadlight Switches Dash MountedDash Mounted Multi-function SwitchMulti-function Switch
Dimmer SwitchesDimmer Switches Headlight CircuitsHeadlight Circuits Flash to PassFlash to Pass Continuity ChartContinuity Chart Concealed HeadlightsConcealed Headlights
Pg L312 & C259Pg L312 & C259
CORNERING LIGHTSCORNERING LIGHTS
Turn Signal ActivatedTurn Signal Activated All the timeAll the time Night time only Night time only
(Parklights on)(Parklights on)
Turn signal has Turn signal has additional set of additional set of contactscontacts
Burn steady whenever Burn steady whenever turn signals are usedturn signals are usedC281 to C 284C281 to C 284
TURN SIGNALTURN SIGNALCIRCUITSCIRCUITS
TURN SIGNALTURN SIGNALCIRCUITSCIRCUITS
TURN SIGNAL SWITCHNeutral C277 to C281
TURN SIGNAL SWITCHNeutral C277 to C281
Left Rear Turn
Right Rear Turn
Stop Switch
Right frontLight & Indicator
Left frontLight & Indicator T-Sig
Flasher
RIGHT TURNRIGHT TURN
Left Rear Turn
RightRear Turn
Front LeftTurn & Ind.
T-SigFlasher
Front RightTurn&Ind
Stop Sw.
LEFT TURNLEFT TURN
Left Turn Rear
Stop Sw RightRear Turn
Front LeftTurn & Ind
T-SigFlasher
Front RightTurn&Ind
PARKING AND TAILLIGHTSPARKING AND TAILLIGHTS
Two Bulb SystemTwo Bulb System Dual filamentDual filament
Three Bulb SystemThree Bulb System 1 bulb for each 1 bulb for each
functionfunction
Bulb color is Bulb color is federally mandatedfederally mandated
C270C270
BRAKE LIGHTSBRAKE LIGHTS
Two Bulb SystemTwo Bulb System Three Bulb SystemThree Bulb System Center Mounted High Stop LampCenter Mounted High Stop Lamp
TWO BULB BRAKE SYSTEMTWO BULB BRAKE SYSTEMC275C275
THREE BULB SYSTEMTHREE BULB SYSTEMC275C275
CENTER MOUNTED HIGH STOP LIGHT (CHMSL)CENTER MOUNTED HIGH STOP LIGHT (CHMSL)
C276C276
BACK UP LIGHTSBACK UP LIGHTSC284C284
SIDE MARKER AND CLEARANCE LIGHTSSIDE MARKER AND CLEARANCE LIGHTS
Federal Requirement Federal Requirement since 1969since 1969
Front - AmberFront - Amber Rear - RedRear - Red On SteadyOn Steady Flash with Turn SignalFlash with Turn Signal
C286C286
Turn Signal on/Parking Light OnTurn Signal on/Parking Light On
Wired parallel with Wired parallel with with parking lights.with parking lights.
high resistance side high resistance side marker light bulbmarker light bulb
ground through turn ground through turn signal filamentsignal filament
turn signal filament turn signal filament less resistance than less resistance than side marker filamentside marker filament
C287C287
Parking lights off/turn signal onParking lights off/turn signal on
Marker light receives Marker light receives power from turn signal power from turn signal switchswitch
Ground for side Ground for side marker through park marker through park light filamentlight filament
Side Marker will flash Side Marker will flash with turn signal lightwith turn signal light
Turn Signal On/Park Lights OnTurn Signal On/Park Lights On
Voltage equal to both Voltage equal to both sides of Marker Lightsides of Marker Light
Flasher turns off Turn Flasher turns off Turn Signal Light then Turn Signal Light then Turn filament is ground for filament is ground for Marker LightMarker Light
Will Stay on until Will Stay on until Flasher Turns Signal Flasher Turns Signal Light on againLight on again
INTERIOR LIGHTSINTERIOR LIGHTS
COURTESY LIGHTSCOURTESY LIGHTS INSTRUMENT CLUSTER AND PANEL INSTRUMENT CLUSTER AND PANEL
LIGHTSLIGHTS DOME LIGHTSDOME LIGHTS OPERA LIGHTSOPERA LIGHTS WARNING LIGHTSWARNING LIGHTS MAP LIGHTSMAP LIGHTS
C288C288