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Underground Lighting  |  SKU: 3157-Res-3s

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

Regular price $35.00

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Description

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.


 

 

Warranty Information

This product has a 1 year warranty

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  • 5 stars: 64 (94%)
  • 4 stars: 4 (6%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
M
Mark Chamberlin

I was sceptical at first, these look like the ones on Ebay an Amazon. I was wrong just installed and was quick and easy and worked!! My led bulbs would flicker when my headlights were on. Not anymore, I forward this site to my son to buy some for his jeep. I will be getting more for the front of my truck also

L
LIVIDSERGAL
Easy and quick

I'd definitely recommend these to anyone who does not want to cut into wires, this plug and play set up works great on my 2010 Camaro. They feel high quality and they heat sink around the resisters. You will definitely need to mount them to something that can transfer heat as they do get fairly hot. All and all when I'm changing out for LEDs in any car I'll be picking more of these up

L
LIVIDSERGAL
Easy and quick

I'd definitely recommend these to anyone who does not want to cut into wires, this plug and play set up works great on my 2010 Camaro. They feel high quality and they heat sink around the resisters. You will definitely need to mount them to something that can transfer heat as they do get fairly hot. All and all when I'm changing out for LEDs in any car I'll be picking more of these up

T
Thomas Hand
Hyper flash resistor harness

Works Great and trailer brake lights work perfectly. Thank you

N
Nathan

As described.

W
W.Y.
Customer service

I ordered these and the shipping took long. I emailed and got a response right back. He was checking in every step of the way making sure I got my resisters. Would definitely buy more from again!

N
Neal Miller
Finally no parking light out message!!

So, I didn't get these to help stop hyperflash, I needed them due to getting the parking light out message on my 2019 RAM Classic 1500 after installing new LED switchback headlights. NONE of the alphaOBD hacks worked but these did. I'm not familiar with resistors and set up so the only problem I had was they lacked any directions or troubleshooting (or at least in my shipment), had to google for best troubleshooting method. Someone online had a good note on how to test if they are set up correctly and how only one side should get hot and needing to rotate either the bulb or the connection. After finding the help document and some flipping of stuff, they worked great. Would recomment 100% over any splice type setups for sure!

J
JOSEPH HARRISON
Awesome plug n play

Product is as described and easy plug n play setup

J
Joseph Harrison
Awesome plug n play

Product is as described and easy plug n play setup

d
david annan
Thanks again

The hyper flash was driving me crazy. Once I purchased these I really didn't think it was going to work that good, but once I put then on my Ram 1500 I was excited to see them work properly.

M
Michael Booker

product worked like it should have stopped the hyper flashes thank you thank

J
Jason Adams
No more hyperflash

Holy smokes that hyperflash is annoying! The connectors plugged right in, I just had to slightly shave the plastic on the base of my led bulbs to fit in the socket. No biggie. 2007 Dodge 2500.... fixed 😉!

R
Raymond Sauceda
Load Resistors work amazingly

I’m really impressed!! These load resistors really help with the hyperflash

A
Anonymous
Load Resistors work amazingly

I’m really impressed!! These load resistors really help with the hyperflash

T
Terry Seets
Worked Great Besides Design

Resistors work as they should, my only complaint was how the wires were ran together. Made it difficult to mount the resisters since there wasn’t very much play

D
Dick Koehne
Quick and easy

The 3157 LED wiring upgrade has given me brighter tail lights with an easy install. No hyper flash any more.

A
Andrew Ashmet
Fantastic, Easy to Install

I was a little concerned after installation because my car was giving me an engine error that I couldn't put my finger on. But after starting the engine and letting it run for a little bit, brake tests and indicators worked just fine. No error codes, no hassle. And this fixed my hyperflash problem. These were also a much better solution than wiring the system manually. Thanks Underground.

M
Marco Marchitelli
Very good quality Vs Amazon shit

You can find these on Amazon for much less, but given the heat these generate I didn’t want to put that garbage on my truck. These are high quality, I’ve had them on for a month with no issues.

M
Mark B
Great Product

Well built and easy to install. Customer support was great working through some issues with the USPS being so slow.

S
Steven Costin
As described

Quick shipping and great customer support. Helped me figure out how to install these correctly and very responsive.

S
Steven Costin
As described

Quick shipping and great customer support. Helped me figure out how to install these correctly and very responsive.

b
brian farley
Perfect

This was exactly what I needed. Works flawlessly!

b
brian farley
Perfect

This was exactly what I needed. Works flawlessly!

N
Nathan Pike
3157 plug and play

They are working great

N
Nathan Pike
3157 plug and play

They are working great

C
Chris Wiltshire

very nice product. I had a hyper flash & my turn signal indicator light would light up when headlights we turned on. I installed these & no more problems. I highly recommend this product !

C
Chris Wiltshire

very nice product. I had a hyper flash & my turn signal indicator light would light up when headlights we turned on. I installed these & no more problems. I highly recommend this product !

A
Ash Everett
So far so good

They’re working good so far. No known issues. Does not hyper flash. I added some aluminum tape to the area I placed them as well as covering any adjacent wires for added heat protection.

R
Renee Rodriguez
The lights

The lights are great! Works perfectly. I would definitely recommend them.

R
Renee Rodriguez
The lights

The lights are great! Works perfectly. I would definitely recommend them.