3157 Switchback LED Turn Signal Bulbs | Dual Color White/Amber, Built-In Resistors, No Hyperflash
3157 Switchback LED Turn Signal Bulbs | Dual Color White/Amber, Built-In Resistors, No Hyperflash is backordered and will ship as soon as it is back in stock.
Description
Description
Premium Dual-Color LED Performance With OEM-Grade Reliability
Give your front turn signals a sharp, modern upgrade with these high-output 3157 Switchback LED bulbs designed for crisp white running lights and vivid amber turn signals. Built with precision engineering and plug-and-play simplicity, these bulbs deliver the luxury-vehicle look while solving the common issues found in typical switchback LEDs—no hyperflash, no overheating, and no error codes in 99% of vehicles.
Key Benefits
Dual-Color Switchback Technology
Each bulb features 54 high-performance SMD LEDs arranged for full 360-degree visibility:
- 18 LEDs emit a clean 6000K white for running light / DRL mode
- 36 LEDs produce a bright 3500K amber for turn signal mode
The transition is instant—white when driving, amber when signaling, then back to white once the signal ends. This creates the striking, upscale lighting effect often seen on modern luxury vehicles.
No Hyperflash, No Error Codes
Our engineering team designed these bulbs with a built-in resistor only on the turn-signal filament, not both circuits. This protects the bulb from excessive heat, prevents housing damage, and ensures reliable CANBUS performance without external load resistors.
Intelligent Cooling for Longer Life
To manage heat during high-output amber operation, each bulb includes a smart cooling fan that activates only when the high filament engages. This reduces thermal stress and extends the bulb’s lifespan far beyond conventional switchback designs.
Bright, Full-Coverage Output
These 24W bulbs produce 1200 lumens of effective output, ensuring your signals are seen clearly from every direction. The 360-degree LED layout enhances both daytime visibility and nighttime safety.
Simple, Plug-and-Play Installation
Designed for direct replacement of standard 3157 incandescent bulbs, installation takes about 10 minutes with no splicing, no external resistors, and no vehicle modifications required.
Technical Specifications
Bulb Type: 3157 Switchback LED (white/amber)
Output: 1200 lumens per bulb
LED Chips: 54 SMD LEDs (18 white / 36 amber)
Color Temperature: 6000K white, 3500K amber
Power: 24W
Illumination Pattern: 360-degree
Resistor Type: Built-in, single-filament resistor (turn signal only)
Cooling: Smart cooling fan (high-filament activation)
CANBUS: No hyperflash, no error codes in 99% of vehicles
Installation Time: Approx. 10 minutes
Install Type: Plug-and-play
Fitment & Compatibility
Designed for vehicles using 3157 front turn signal bulbs.
Compatible replacements: 3157, 3156 (note: 3157 replaces 3156, but 3156 cannot replace 3157).
Ideal for DRL/parking light and turn signal combination housings.
If you are unsure of fitment, we can confirm compatibility for your specific vehicle.
Why Choose Underground Lighting
We engineer our switchback LEDs for real-world conditions—bright output, stable CANBUS operation, safe heat management, and long-term reliability. Our single-filament resistor design and smart cooling system set a higher standard for durability and performance. Every product is backed by expert support and built to exceed expectations.
Need help choosing the right switchback turn signal bulbs for your vehicle? Contact our lighting specialists online or call us on (561)-918-5225.
CA Residents WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Note: Your socket must have three wires for proper dual-color functionality. Two-wire sockets will only display one color. Most 3157 applications use 3-wire systems compatible with both white and amber operations.
Frequently Asked Questions (FAQ)
Frequently Asked Questions (FAQ)
3157 Switchback LED Bulbs with Built-in Resistors FAQs
What is a switchback LED?
Switchback LED bulbs are specialized turn signal lights designed for dual-filament sockets. They operate in two distinct modes: bright white when running lights are active during everyday driving, then instantly switching to vibrant amber when the turn signal is engaged. Once the turn signal cycle completes, they automatically "switch back" to white.
This dynamic color-changing capability creates a premium, distinctive lighting signature while improving visibility for both you and other road users. The crisp white/amber contrast provides clearer signaling in all conditions, enhancing both style and safety.
Why does my switchback light up amber as daytime running light (DRL) instead of white?
This happens because your vehicle uses the high filament (turn signal circuit) for daytime running lights rather than the low filament, which is common in specific models like Corvettes and various Toyota vehicles. To get white DRLs instead of amber yellow, simply turn on your low-beam headlights. This will switch the power to the low filament circuit, activating the white LEDs for your running lights.
Do I need to add a switch for LED Switchbacks to work?
Our 3157 Switchback LED light bulbs work with your vehicle's existing electrical system - no additional switches needed. They automatically change from white (when running lights are on) to amber (when turn signals activate). These plug-and-play bulbs install in under 10 minutes with zero wiring modifications needed for most vehicles. They're energy-efficient, environmentally friendly, and provide an instant lighting upgrade for your car or truck.
Why do my 3157 LED switchback bulbs only illumine one color instead of two?
This typically indicates a single-filament socket configuration. For proper switchback functionality, your socket must have at least 3 wires. If your socket has only 2 wires, it's a single-filament application that cannot support color-switching capability. No switchback bulb will display both colors in this case. If your socket has 3+ wires but still shows only one color, check that the metal contacts on the LED bulb are properly aligned and make a solid connection with your socket terminals.
Warranty Information
Warranty Information
3157 Switchback LED Turn Signal Bulbs | Dual Color White/Amber, Bui...
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