Best Car Alternator Resistors of 2025

"I found this product to be great; it works as intended. The length of the wire was just right for my setup with a 105 amp alternator on my LS3 swapped ‘78 Firebird."

"This connector does exactly what I need. The 96-inch length seemed like a lot, but it was perfect without requiring any splices."

"I utilized this adapter for my 4 wire alternator configured for single wire use, and I was pleased to see it work perfectly. The resistor is already included, which made wiring it into a 12V source effortless."

"After installing LED taillights, I faced rapid flashing. These resistors fixed the problem easily. I used 3M double-sided tape for mounting, and the housing is nice. I would definitely recommend this product!"

"I had hyper flashing issues with my turn signals after switching to LED bulbs. These resistors were the solution! The installation was quick and straightforward, and they perform as intended without overheating. Highly satisfied!"

"I struggled at first with wiring these resistors. They require specific polarity, which isn't mentioned in the instructions. However, once I figured it out, they worked well when the engine runs. Frustrating, but they do function."

"I absolutely love the high quality materials used in this product. It feels premium in my hands."

"The customer service was outstanding; they helped me with all my questions promptly."

"I've been using it for months, and it's still as durable as the day I got it. Stylish design too!"

"I found the quality of this product to be very good and it fits my needs perfectly."

"Everything fit well, making it an easy peeze job. I will definitely shop on Amazon again for golf cart parts. It's simply a wire with a resistor!"

"The resistor looks good, but I'm not sure where the delivery driver left the package. It wasn't handed to anyone. My son actually discovered the package in our neighbor's yard while mowing the grass. Typically, the delivery service takes a picture of where it's left."

“It worked just like it was supposed to. I will definitely buy again.”

“This looks like a good connector with a long wire. However, the resistor is quite small and blends in, so I have to look closely to find it. I’m a bit concerned that it might not last long. Also, it only has one wire attached, and I might need some additional wires, so I may add some later. Time will tell, and I might update this review later.”

"I was having trouble with my newly mounted LED taillights. After discussing with a friend, I decided to try these load resistors to ensure my truck's system pulls enough power. Installation was straightforward, though hiding them away from other wires was a bit tricky since they get extremely hot. The entire process took around 5 hours as I identified and fixed the issues. Thankfully, all lights are now functioning as intended!"

"Initially, I considered adding an LED flasher, but it didn't work out. I knew that load coils generally do the trick, even if they're harder to install. However, I'm really impressed with these resistors. They perform exactly as described, and as long as they're installed properly, I haven't encountered any issues."

"After putting LED bulbs in my 2010 GMC Sierra's tail lights, they started hyper flashing. I thought replacing the blinker solenoid would help, but GM's design routed that function through the BCM, complicating things. Using these resistors fixed the problem. I installed one on each taillight and the front turn signals too. The kit included wire connectors, but I opted for solder-filled butt connectors for reliability. It's simple: connect one to the hot wire and the other to ground (typically black) to trick the electrical system into thinking everything's fine. Definitely worth the investment to eliminate hyper blinking."

"I have a 2009 Honda Fit, and my blower only worked on high. After some research, I discovered that replacing the blower and resistor assembly was necessary. The dealership quoted me $457, which seemed outrageous! I found the parts on Amazon for a fraction of the cost and installed them quickly. The blower works well now, although it does have a slight whine at high speed. The installation was straightforward, but getting the old resistor out took longer due to the glued screws. Overall, it was a simple job that I could have done in 20 minutes if not for that."

"I replaced the resistor in my 2011 Honda Fit without any mechanical experience. I watched a YouTube video beforehand, and the process was easy and quick. It took me about 15 minutes to get everything done. However, I had to replace it again after 10 months. I learned that if it fails again, I might need to replace the blower too. Luckily, Amazon offers a compatible blower that’s $150 cheaper than the OEM version."

"For my 2009 Honda Fit Sport, the blower only worked on level 4. After some online searching, I found this part to be the solution. The shipping was quick, and after removing a couple of bolts, I had the new unit in place. Now, everything is functioning perfectly. I believe OEM products are the way to go for reliability."

"I bought a package of eight because the first one I installed on my turn indicator failed. It’s hit or miss; the second one is functioning nicely. I've been installing these for years when converting from incandescent to LED turn signals on older vehicles. I recommend them!"

"I needed these resistors due to the hyper blink that occurred when I installed LED turn signals. While it was a bit of a pain to add, I found helpful videos on YouTube. They’ve been working great for 6 months!"

"These resistors worked perfectly for me, and I'm very pleased with the product overall."

“I experienced hyper flashing with my LED turn signal bulbs on my Toyota Tacoma, but these fixed the problem completely. The installation was basically idiot-proof, and it didn't matter which wires I connected to positive or negative. I would definitely purchase again.”

“The 6” cables were very simple to fit and were ready to go right out of the package. I was impressed with how easy it was.”

“Almost all of the connections to the resistor pulled out, which was a bit frustrating, but I managed to make my own connections to prevent the hyper flash issue from occurring.”

"I purchased these to use alongside another set I got from AutoZone. They run parallel with the lights, with one end connecting to the positive and the other to the ground. The wire is thick and well-insulated, making it a great choice. Plus, it was much cheaper than what I found at the parts store."

"I managed to attach the load resistors to the stop light's positive and negative wires using the included hardware with minimal difficulty. My prior technical experience helped, as there were no instructions available. After installation, the error messages cleared for both the right and left displays on my 2016 MB GL 450."