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3157 Switchback Wiring and Troubleshooting Tips
Very Important Note: Led light bulbs do not have brains. computers or complex logic chips built in. Automobile circuits on the other hand often do have brains, computers and/or complex logic chips built in.
While the led bulbs are very simple, automobile circuits on the other hand are very complex and vary even within the same models. When you plug an led bulb into a circuit, you are not testing the bulb itself, you are testing a system which includes circuitry, battery, + the led bulbs. If the led bulb is not functioning as anticipated, the problem may lie in any part of the system. The bulb only serves as an indicator for what the system is doing.
Led bulbs and glass bulbs may make the circuit/system operate differently, so never use a glass bulb to predict how the circuit will operate with an led bulb installed.
How to determine if the bulb is faulty or the vehicle circuitry is just not functioning with the led bulbs in place.
Installing led bulbs are not always a "plug and play" operation. Although we have devised our patented circuitry with as much logic as possible to allow it to plug and play in many vehicles, it is not possible to design the switchback bulbs to plug and play in 100% of all vehicles.
In order to properly diagnose and fix problems, it is essential to isolate bulb related problems from circuit related problems. It is never a good idea to plug and led bulb into a vehicles circuit to test the led bulb. This is testing both the led bulb and the circuit at the same time. This method of testing will make it impossible to isolate problems with the bulb from problems with the circuit.
It is always recommended that if the bulb is not working in the circuit, test the led bulb using two wires connected direct to battery or any other known 12 volt DC power source. This is the only way an led bulb can be isolated from the circuit related problems and properly tested.
How to fix circuit related problems.
OK you plugged your new led bulbs in and they "don't work". The bulb must be defective, right? WRONG!
First... Did you test the bulbs as described above? If not, you need to test the bulbs only. Use the diagrams shown above to test the bulbs. It is best to use two wires that are connected direct to battery to test the bulbs. If you did not test the bulb as prescribed, you will never figure out if the problem is with the bulb or the circuit or the installation. Never assume the bulb must be bad. 99.8% of the time, the led bulbs are working as they should, but the circuitry is just not set up to operate properly with an led bulb. The odds that you received a non-functional LED bulb is very unlikely....less that 1 in 500.
99% of the time, the circuit related issues can be overcome, but it may take some extra effort and/or some minor wiring changes to get the Switchback bulbs to work in some vehicles.
Here is a list of some common symptoms and fixes for automotive circuitry:
Note: There are two styles of switchback bulbs:
1. AO - Amber - Off
2. AW - Amber - White
AO - Amber - Off
The Amber -Off (AO) Switchback bulb has special circuitry inside that senses when there is voltage on the (amber) turn signal circuit. Whenever there is voltage on the (amber) turn signal circuit, the bulb switches off power to the (white) running light circuit for 2 seconds. The result is that in most vehicles, the switch back bulb will flash amber-off-amber off whenever the turn signal is activated, even when there is power to the (white) running light circuit.
The bulb will switchback to white if the headlights are switched on and the turn signal circuit is switched off for 2 seconds.
The bulb will switchback to off if the headlights are switched off and the turn signal circuit is switched off for 2 seconds.
The result (in most vehicles) is shown in this animation with the headlights on.
AW - Amber - White
The Amber -White (AW) Switchback bulb has special circuitry inside that senses when there is voltage on the (amber) turn signal circuit. Whenever there is voltage on the (amber) turn signal circuit, the bulb switches to amber mode. The result is that in most vehicles, the switch back bulb will flash amber-white-amber-white, whenever the turn signal is activated and the headlights are on.
In some vehicles, the power to the (white) running light circuit is automatically switched off whenever the turn signal is activated. In these cases, the AW switchback will flash amber-off-amber off whenever the turn signal is activated.
In most vehicles, the AW switchback will flash amber-off-amber off whenever the turn signal is activated and the headlights/running lights are off..
The AW switch back bulb as it will operate (in most vehicles) is shown in this animation with the headlights on.
|Automotive Replacement Bulbs:||Other Products:||Reference:|
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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 Willy s|
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