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Underground Lighting  |  SKU: 3157-F150-R

1997–2020 Ford F-150 / F-250 / F-350 LED Rear Turn Signal & Brake Replacement Bulbs for 3X Rear Visibility | 300% Brighter 1600LM (PAIR) | 3157 Red, Built-in Resistor, No Hyperflash

$64.99 $69.99

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Rear visibility is often an issue with trucks

  • 300% brighter than halogen for clearer braking and signalling
  • Built-in resistor eliminates hyperflash instantly
  • Advanced cooling extends lifespan up to 10× longer
  •  3157 plug & play, zero wiring required
  • Designed in the USA, assembled with Japanese components

  • - Brake lights compete with sunlight and surrounding vehicles. Halogen bulbs output ~300–400 lumens, limiting visibility. 1600-lumen LED output of 3157 turn signals improves detection distance, helping following drivers react faster.

  • - High-power LEDs produce 1600 lumens across a 360° beam angle, ensuring visibility from rear and side angles. This improves braking awareness, signalling clarity, and collision prevention.

  • - Dual-intensity circuit supports low (parking) and high (brake/turn) output, switching instantly. This ensures proper signal priority, clean transitions, and no overlap between lighting functions.

  • - LED bulbs draw lower current than halogen bulbs, triggering rapid blinking. Built-in resistor simulates factory load (~60–120 flashes/min), restoring correct flash rate without external resistors.

  • - Excess heat reduces LED efficiency and lifespan. The fan + metal heatsink system regulates temperature, maintaining stable brightness output and extending lifespan up to 10× longer than halogen bulbs.

  • - Designed in the USA and built with Japanese components, ensuring durability and precision. Improved thermal and electrical stability delivers consistent 1600-lumen output and long-term reliability

  • - Installation time is approximately 10 minutes. There is no need for slicing or complicated wiring. This light is a plug-and-play installation and operation. 

  • Choose the best LED Turn Signal Replacement bulb for your Ford 150, 250, 350 with our Ford turn signal guide 

    WHAT'S INCLUDED

    BULBS :
    2X 3157 Red Canbus LEDs With built in resistors
    WARRANTY :
    Includes a 1-Year Manufacturer Warranty covering defects under normal use.

    PRODUCT INFORMATION

    Function - Rear Turn / Brake / Parking

    Compatibility - 1997–2020 Ford F-Series

    Variant - 3157

    Beam Angle - 360° Coverage

    Cooling System - Fan + Metal Heatsink

    Electrical Design - Non-polar, CK Compatible

    Hyperflash - No (Built-in resistor)

    Installation - Plug & Play

    Quantity - Pack of 2

    TECH SPECS

    WATTAGE :
    27W
    LENGTH :
    2.4"
    DIAMETER :
    .83"
    INTENSITY :
    1600 Lumens
    BLINKER CIRCUITS :
    No Resistors Required
    CIRCUITS :
    12V
    This product has a Includes a 1-Year Manufacturer Warranty covering defects under normal use.

    Yes. OEM-spec 3157 base ensures proper locking and contact alignment. Dimensions (2.4" length, 0.83" diameter) are optimised to fit factory housings without looseness or instability.

    No in most cases. Built-in resistor simulates factory load, preventing BCM detection errors. FORScan is not required under normal conditions, though rare vehicle-specific sensitivity may vary.

    Hyper flash is where the turn signals or indicators on a vehicle blink at a much faster rate than normal. This can be caused by several factors:

    • Bulb Failure: The most common cause of hyper flash is a burnt-out or malfunctioning bulb in one of the turn signals or hazard lights. When one of these bulbs fails, the system detects a lower load on the circuit and increases the flash rate as a warning to the driver.
    • Installing an LED Bulb: When replacing traditional incandescent bulbs with LED bulbs in vehicles that were not designed for LEDs, you might experience hyper flash. LED bulbs use less power, and the vehicle's flasher relay may interpret this as a burnt-out bulb.
    • Faulty Flasher Relay: The flasher relay is responsible for controlling the rate of blinking of the turn signals. If it malfunctions, it can cause hyper flashing or erratic blinking. Replacing a faulty flasher relay can resolve this issue.
    • Wiring Issues: Damaged or corroded wiring can disrupt the electrical flow in the turn signal circuit, affecting the flash rate.
    • Incorrect Bulb Type: If the wrong type of bulb is installed, it can draw too much or too little power, leading to hyper flash.
    • Resistance Issues: Some vehicles use a variable load sensing flasher relay, which can detect changes in resistance. When adding additional lights or modifying the wiring, you might change the resistance in the circuit, causing hyper flash.

    LED bulbs draw a lot less power and current making the Body Control Module think the bulb is out.




    The most common reason is basic mistake many make. Make sure you start the vehicle and let the engine run before testing your turn signal for hyper flash. Starting the engine turns on the BCM so the computer can see the resistance in the bulb.

    Covers manufacturing defects under normal use:

    • LED chip failure
    • Cooling system malfunction (fan/heatsink)
    • Electrical faults (resistor/CANBUS issues)

    Does not cover physical damage, incorrect installation, corrosion, or water ingress from broken housings.

    Yes, ours is unique and different from other competitors.
    Unlike other brands out there that don't work, ours will. We specially designed the circuit board to work with the BCM.

    Yes, we offer free shipping on orders over $89.

    COMPATIBILITY

    FITMENTS :
    1997-2020 Ford F Series LED Rear Brake and Turn Signal

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