To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
Smart diodes are our favorite option for getting brake and turn signals on your towed car. They are really well-made and reliable, plus pretty easy to install. This complete kit includes everything you need for multiplex incandescent tail lights.
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Notes:
"Don't be intimidated by diodes: if you can strip and crimp wire, this installation will be no problem."
A variable voltage tail light (also known as multiplex) uses the same wire for both the brake light and the tail light, sending a 12-volt signal to the brake light and a 9-volt signal to the tail light. This works fine when you're driving, but when you are flat towing, the RV will send a 12-volt signal to both the brake light and tail light, making them the same level of brightness and impossible to distinguish from each other. The drivers behind you won't be able to tell the difference between your tail lights and your brake lights, which is a huge safety issue.
These smart diodes solve that problem by simply converting the signal from the RV to the lower voltage needed for your car's tail lights. They install permanently, but don't worry; everything will work as normal when you're not flat towing.
This kit is designed to work with incandescent lights only, so if you have LED variable voltage lights, you'll need kit RM38FR (sold separately) instead.
If the engine is off and your car's brake lights illuminate when you press the brake pedal, you need to install a brake light relay (RM-88400 - sold separately) with this kit. Without a relay, your car's brake signal will override the turn signal sent by the RV when you are slowing down to make a turn, creating a potentially dangerous situation. Other drivers will see that you're slowing down, but not that you're making a turn. With a brake light relay, you can signal both and travel safely.
A combined lighting system, or 2-wire system, uses the same light bulb to signal both braking and turning. (In other words, the car signals a turn by flashing the brake light.)
A separate lighting system, or 3-wire system, has the brake signal and the turn signal light up independently of each other. Typically, the turn signal is amber.
If your motorhome has a separate lighting system, add a tail light wiring converter (RM-732 - sold separately) to keep your setup functioning properly.
Customer Satisfaction Score:
94% were satisfied with this product
6% of customers were not satisfied
Ratings & Reviews
Thanks
Great product!!
Great company to purchase from. Very fast delivery.
Installation went very well with the help of the video on your website. Thanks.
Work as advertised - no issues
Great service .I had a problem with a part they sent a new one and it worked great.Would recommend.
This is to rig my third vehicle for flat towing behind our motorhome. I am sure that the e-trailer people will be available to help me if I need advice.
Works like towing a trailer, The wiring was a challenge and the E-Trailer video on installatios was very helpful
Worked well, made it easier for may ins taller.
A very easy installation. The instructions and kit quality were very good. I installed this kit on a 2019 Chevy Spark that I tow behind an RV. The lights have never failed to work as expected. I would highly recommend this product.
Easy to install following the etrailer video. Hardest part for me was finding the best spot to install the 6 pin received on the front of my 2021 F150. Finally decided to mount thru the license plate bracket. The only issue I had was the provided 4 wire was too short for my installation. Found additional matching wire at my local Ace hardware.
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