3157 Resistor Harness stops Hyper Flashing and Errors Plug and Play (PAIR)

A Simple, Reliable Solution for LED Hyper Flashing and Error Codes

This 3157 LED Resistor Harness is designed to eliminate hyper flashing, no-flash issues, and false bulb-out warnings that occur when upgrading to LED turn signals or daytime running lights. Built as a plug-and-play solution for most modern vehicles, this harness simulates the load of a standard incandescent bulb without cutting, splicing, or adding standalone resistors.

Key Benefits

Stops Hyper Flashing and Error Messages

Each harness contains a 6-ohm, 50-watt load resistor that mimics the electrical draw of a traditional filament bulb. This stabilizes the circuit and restores normal blinking behavior for LED turn signal and DRL applications.

Compatible With Single-Color and Switchback LEDs

Whether you’re using standard amber LEDs or dual-color switchback bulbs, this harness ensures proper function by balancing the load on the turn-signal circuit.

Plug-and-Play Installation

The harness installs directly into the factory socket for most vehicles. No splicing or custom wiring is required for the majority of applications. Simply plug it in, mount the resistor to a metal surface, and restore proper signal performance.

Universal Fit

These resistors work with most Dodge, Ford, Chevrolet, and many other vehicles. They are commonly used on:
Dodge RAM 1500, 2500, 3500
Ford F-150, F-250, F-350
Chevrolet Silverado and similar models

Important Fitment Note

This harness fits vehicles with a factory socket that locks into place using three tabs. If your OEM socket uses two or four tabs, such as certain older models or some Toyota vehicles, this harness will not fit. Comparing your socket to the product photos is recommended.

Technical Specifications

Load: 6 ohms, 50 watts
Application: LED turn signals and daytime running lights
Fitment: Designed for 3157 sockets (single-color or switchback bulbs)
Installation type: Plug and play
Installation time: Approximately 10 minutes
Harness quantity: Pair (one for each side)

Heat Safety Information

Load resistors generate heat during operation and should always be mounted to a metal surface away from plastic components. This applies to all load resistors on the market.

Why Choose Underground Lighting

This harness is engineered to solve the most common LED upgrade issues without the complexity of cutting wires or rewiring factory circuits. With easy installation, reliable performance, and proven compatibility with many popular trucks and SUVs, it is the ideal solution for restoring proper LED turn signal and DRL function.