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Note: The 3157 led bulb will function in either 3157 or 3156 sockets. In the 3156 socket, the 3157 will have extra contacts that are not connected to anything. The 3156 will not function in the dual bright dim mode in the 3157 socket.
This can be seen in the wiring diagram below.
3157 to 3156
conversion
3157
The 3157 is a dual contact (d.c.) bulb (Shown left). The dual contacts are connected to 2 separate circuits inside the bulb. One for bright or high beam (braking/turn signals) and one for dim or low beam (running/parking lights).
The 3157 has four separate wire contacts protruding from the bottom. If you examine the bulb closely, you can see that two of the wire contacts connect to the same point inside the bulb. These two contacts are the common negative (-) grounds.
Note: Use Special 3157-SRCK (Red) or SACK (Amber) bulbs to replace the center tail lamp bulbs on:
88-99 (Old Body Style) Chevy and GMC full size trucks & SUVs.
95-01 Cavalier and Sunfire tail lamp bulbs
92-98 Grand Am tail lamp bulbs
and Toyota Tundra front turn signals
Use the regular 3157 bulbs for the top tail lamp bulb on:
88-99 (Old Body Style) Chevy and GMC full size trucks & SUVs.
95-01 Cavalier and Sunfire tail lamp bulbs
These special 3157-SRCK (Red) or SACK (Amber) bulbs are available:
CLICK HERE TO >>ORDER SPECIALLY WIRED SRCK & SACK BULBS
We are also finding other vehicles that are sometimes wired this way. As you can see from the diagrams, a regular 3157 led cannot be easily altered to make it into an SRCK:
3157 SRCK/SACK
3156
The 3156 is a single contact (s.c.) bulb. The 3157 led bulb can be used universally in either 3157 or 3156 applications. We usually ship 3157 bulbs, unless the 3156 is specified in the order, to provide the greatest flexibility of application for the user.
In a very few vehicles, the low and high + Positive leads on the 3157 will need to be bent to the opposite sides so that the bulb will light on the brighter high beam circuit in the 3156 application. If not sure which 2 leads are the positive leads, just bend all leads around to the opposite sides. This will ensure that the high beam circuit connects to the high beam contact on the bulb. Use care when bending the leads and only bend one time to avoid breaking them off. The leads should only be bent one time.
The 3156 has two separate wire contacts protruding from the bottom. One of these two contacts is the common negative (-) ground. The remaining contact is the positive (+) side of the circuit. The 3157 extra contacts don’t connect to anything in the 3156 socket and the bulb will light high beam only in the 3156 socket.
7443 to 7440 conversion
7443
Note: The 7443 led bulb will function in either 7443 or 7440 sockets. In the 7440 socket, the 7443 will have extra contacts that are not connected to anything. The 7440 will not function in the dual bright dim mode in the 7443 socket.
This can be seen in the wiring diagram below.
The 7443 is a dual contact (d.c.) bulb (Shown left). The dual contacts are connected to 2 separate circuits inside the bulb. One for bright or high beam (braking/turn signals) and one for dim or low beam (running/parking lights).
The 7443 has four separate wire contacts protruding from the bottom. If you examine the bulb closely, you can see that two of the wire contacts connect to the same point inside the bulb. These two contacts are the common negative (-) grounds.
7440
The 7440 is a single contact (s.c.) bulb. The 7443 led bulb can be used universally in either 7443 or 7440 applications. We usually ship 7443 bulbs, unless the 7440 bulb is specified in the order, to provide the greatest flexibility of application for the user.
In a very few vehicles, the low and high + Positive leads on the 7443 will need to be bent to the opposite sides so that the bulb will light on the brighter high beam circuit in the 7440 application. If not sure which 2 leads are the positive leads, just bend all leads around to the opposite sides. This will ensure that the high beam circuit connects to the high beam contact on the bulb. Use care when bending the leads and only bend one time to avoid breaking them off. The leads should only be bent one time.
The 7440 has two separate wire contacts protruding from the bottom. One of these two contacts is the common negative (-) ground. The remaining contact is the positive (+) side of the circuit. The 7443 extra contacts don’t connect to anything in the 7440 socket and the bulb will light high beam only.
To find out if these bulbs will fit your vehicle..........
Click Here>> http://www.sylvania.com
Then go to: Automotive Replacement Guide - find the right light source for your vehicle
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These Bulbs are Commonly Used in: Acura CL Integra Legend MDX NSX RL RSX SLX TL TSX Vigor Alfa Romeo Spider AMC Aston Martin Audi A3 A4 A6 A8 Allroad Cabriolet Q7 RS4 RS6 S4 S6 S8 TT Austin Austin Healey Bentley BMW 2002 3 Series 5 Series 6 Series 7 Series 8 Series M3 M5 M6 M Roadster & Coupe X3 X5 Z3 Z4 Z8 Buick Century Electra Grand National Lacrosse LeSabre Lucerne Park Avenue Rainier Reatta Regal Rendezvous Riviera Roadmaster Skylark Cadillac Allante Catera CTS DeVille Eldorado Escalade Fleetwood Seville SRX STS XLR Chevrolet Astro Avalanche Aveo Bel Air/150/210 Blazer C/K Pickup 1500 C/K Pickup 2500 C/K Pickup 3500 C-10 Camaro Caprice Cavalier Chevelle Cheyenne Cobalt Colorado Corsica Corvair Corvette El Camino Equinox Express G20 Van HHR Impala Lumina Malibu Monte Carlo Nova S-10 Silverado 1500 Silverado 2500 Silverado 3500 SSR Suburban Tahoe Tracker Trailblazer Uplander Venture Pickups Chrysler 300 Series Aspen Cirrus Concorde Crossfire Imperial LeBaron LHS New Yorker Newport Pacifica Prowler PT Cruiser Royal Sebring Town & Country Citroen Cord Daewoo Datsun Z-Series DeLorean DeSoto Dodge Avenger Caliber Caravan Challenger Charger Coronet Dakota Dart Durango Grand Caravan Intrepid Lancer Magnum Neon Nitro Power Wagon Ram 1500 Ram 2500 Ram 3500 Ram Van Shadow Sprinter Stealth Stratus Viper Pickups Eagle Edsel Ferrari 360 Fiat Ford Aerostar Aspire Bronco Bronco II Contour Crown Victoria Edge Escape Escort E-Series Van Excursion Expedition Explorer Explorer Sport Explorer Sport Trac F-100 F-150 F-250 F-350 Fairlane Fairmont Falcon Five Hundred Focus Ford GT Freestar FreeStyle Fusion Galaxie Model A Model T Mustang Probe Ranchero Ranger Taurus Tempo Thunderbird Torino Windstar Geo GMC Envoy Jimmy Safari Savana Sierra 1500 Sierra 2500 Sierra 3500 Sonoma Suburban Typhoon Yukon Honda Accord Civic CR-V CRX Del Sol Element Fit Insight Odyssey Passport Pilot Prelude Ridgeline S2000 Hummer H1 H2 H3 Hyundai Accent Azera Elantra Santa Fe Sonata Tiburon Tucson Infiniti FX G20 G35 I30 I35 J30 M Q45 QX4 QX56 International Harvester Scout Isuzu Amigo Rodeo Trooper VehiCROSS Jaguar E-Type S-Type XJ6 XJ8 XJR XJS XK8 X-Type Jeep Cherokee CJ Commander Commando Grand Cherokee Liberty Renegade Wagoneer Wrangler Kia Rio Sedona Sephia Sorento Spectra Sportage Lamborghini Lancia Land Rover Defender Discovery Freelander LR3 Range Rover Lexus ES GS GX IS LS LX RX SC Lincoln Aviator Continental LS Mark Series Navigator Town Car Zephyr & MKZ Lotus Elise Esprit Maserati Mazda 323 626 929 B-Series Pickups CX-7 Mazda3 Mazda5 Mazda6 Millenia MPV MX-3 MX-5 Miata MX-6 Protégé RX-7 RX-8 Tribute Mercedes Benz 190 Series 200 Series 300 Series 400 Series 500 Series 600 Series C Class CL Class CLK Class CLS Class E Class G Class M Class R Class S Class SL Class SLK Class SLR McLaren Mercury Capri Comet Cougar Grand Marquis Mariner Milan Montego Monterey Mountaineer Mystique Sable Tracer Villager MG MGA MGB Midget T-Series Mini Classic Mini Mini Cooper Mini Cooper S Mitsubishi 3000GT Diamante Eclipse Galant Lancer Mirage Montero Nash Nissan 200SX 240SX 280ZX 300ZX 350Z Altima Armada Frontier Maxima Murano Pathfinder Quest Sentra Stanza Titan Versa Xterra Oldsmobile 442 Alero Aurora Bravada Cutlass Eighty-Eight Intrigue Ninety-Eight 98 Silhouette Toronado Opel Packard Peugeot Plymouth Acclaim Barracuda Duster Fury Grand Voyager GTX Neon Prowler Road Runner Satellite Sundance Voyager Pontiac Bonneville Catalina Fiero Firebird G6 Grand Am Grand Prix GTO Le Mans Montana Solstice Sunbird Sunfire Tempest Trans Am Vibe Porsche 356 911 912 914 924 928 930 944 968 Boxster Cayenne Cayman Renault Rolls-Royce Saab 900 9000 9-2X 9-3 9-5 9-7x Saturn Ion L-Series S-Series Sky Vue Scion tC xA xB Shelby Studebaker Subaru Forester Impreza Legacy Outback SVX Tribeca Suzuki Toyota 4Runner Avalon Camry Celica Corolla FJ Cruiser Highlander Land Cruiser Matrix MR2 Paseo Previa Prius RAV4 Sequoia Sienna Solara Supra Tacoma Tercel Tundra Yaris Triumph Spitfire TR-6 Volkswagen Beetle (Pre-1998) Beetle - New (1998-Present) Bus Vanagon Cabrio EuroVan Golf Jetta Karmann Ghia Passat Phaeton Rabbit Thing Touareg Vanagon Volvo 240 740 850 940 C70 S40 S60 S70 S80 V40 V50 V70 XC Cross Country XC90 Willys |
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