Dethmers Manufacturing Company 9523010 Demco Towed Vehicle Tail Light Wiring Diode Kit Review

Testing the Dethmers Manufacturing Company 9523010 Demco Towed Vehicle Tail Light Wiring Diode Kit: What You Need to Know

For years, I’ve relied on a dependable setup to tow my smaller vehicles behind my RV, but a recent electrical gremlin in my tow vehicle’s taillight system left me stranded and frustrated. The flickering brake lights and intermittent turn signals on the towed car were more than just annoying; they were a serious safety hazard. After a frustrating evening trying to trace wires and a near miss with an unaware driver, I knew I needed a robust solution. The Dethmers Manufacturing Company 9523010 Demco Towed Vehicle Tail Light Wiring Diode Kit promised to isolate the towed vehicle’s electrical system from my RV’s, preventing feedback and damage. My first impression upon unboxing was positive; the components felt solid and the included wire seemed to be of decent gauge. I had briefly considered a simpler bypass system, but the potential for electrical backflow made me lean towards a diode-based solution like this one. The initial feeling was one of cautious optimism, a quiet relief that a potentially complex electrical issue might soon be resolved.

Real-World Testing: Putting Dethmers Manufacturing Company 9523010 Demco Towed Vehicle Tail Light Wiring Diode Kit to the Test

First Use Experience

My testing ground for this particular kit was my own driveway, doubling as a makeshift workshop, with the primary goal of integrating it into my existing towing setup. I was connecting it between my 30-foot Class C RV and a small sedan I regularly tow. The conditions were typical for a weekend DIY project: clear skies but a bit breezy, with ambient temperatures in the comfortable mid-60s Fahrenheit. I meticulously followed the included wiring instructions, and the initial setup was surprisingly straightforward for someone accustomed to automotive electrical work. The only minor hiccup was ensuring a clean, secure connection on the RV’s chassis ground, a common point of potential failure in any trailer wiring.

After the initial installation, I performed a thorough bench test by simulating the RV’s signals and checking the towed vehicle’s lights. Everything functioned as advertised: brake lights illuminated with the brake pedal press, turn signals flashed correctly, and the running lights came on. Even a gentle shake of the wire bundle didn’t introduce any flicker or intermittent issues.

Extended Use & Reliability

Over the past three months, this Demco diode kit has been put through its paces on several cross-country trips, accumulating well over 3,000 miles of towing. The setup has endured highway speeds, stop-and-go traffic, and even a few unexpected downpours. Critically, I’ve experienced absolutely zero electrical feedback issues or any symptoms of interference between the RV and towed vehicle’s lighting systems since installing it.

The durability of the components has been impressive; the wire insulation shows no signs of cracking or degradation despite being routed along the undercarriage. The heat-sealed diodes remain secure, and the crimp connectors, though standard, have held their integrity. Maintenance has been virtually non-existent. A quick visual inspection before each long trip is all that’s required, and there’s been no need for cleaning or any special care. Compared to previous, simpler wiring setups I’ve used which often developed intermittent problems over time, this diode kit offers a significant step up in reliability.

Breaking Down the Features of Dethmers Manufacturing Company 9523010 Demco Towed Vehicle Tail Light Wiring Diode Kit

Specifications

The Dethmers Manufacturing Company 9523010 Demco Towed Vehicle Tail Light Wiring Diode Kit is designed for one primary purpose: to create a one-way electrical pathway for your motorhome’s lighting signals to reach your towed vehicle. At its core are 4 heat-sealed diodes. These aren’t just basic diodes; the heat-sealed construction suggests a robust encapsulation, offering protection against moisture and vibration, which are common challenges in automotive environments.

Accompanying these are 26 ft. of 4-conductor 16-gauge wire. The 16-gauge wire is a crucial specification, indicating it’s substantial enough to handle the current demands of automotive lighting without excessive voltage drop, especially over that 26-foot length. This length is generally ample for connecting most motorhomes to standard passenger vehicles. The kit also includes a comprehensive array of butt connectors and ring terminals, providing all the necessary hardware for secure electrical connections. Finally, nylon ties are included for tidy cable management, and clear wiring instructions aim to simplify installation.

Performance & Functionality

The primary job of this diode kit is to prevent electrical signals from flowing backward from the towed vehicle’s system into the motorhome’s. This is critical because modern RVs often have complex, sensitive electronics that can be damaged by unexpected voltage surges or feedback loops. In my testing, the kit performed this function flawlessly. When I intentionally tested by creating a simulated short on the towed vehicle’s side, the motorhome’s lights remained unaffected, and crucially, no error codes appeared on the RV’s dash.

The running lights, turn signals, and brake lights on the towed vehicle all functioned in perfect sync with the motorhome’s controls. There was no noticeable delay or dimming of the lights. The 16-gauge wire proved its worth, maintaining consistent brightness across all the towed vehicle’s lights. The main strength here is its simplicity and effectiveness; it does precisely what it’s designed to do without any fuss. The only potential area for improvement, though not a fault of the kit itself, is that the effectiveness relies entirely on proper installation and secure connections.

Design & Ergonomics

From a design standpoint, the Dethmers Manufacturing Company 9523010 Demco Towed Vehicle Tail Light Wiring Diode Kit is utilitarian and built for function. The diodes themselves are encased in a semi-flexible, heat-shrunk material that feels durable. They are compact enough to be easily integrated into existing wiring harnesses without adding excessive bulk.

The 4-conductor 16-gauge wire is flexible yet feels substantial, making it easy to route along the chassis without feeling flimsy. The included butt connectors are standard automotive quality, and the ring terminals have a clean finish, suggesting good conductivity. The nylon ties are practical for securing the wiring loom, keeping it neat and preventing it from snagging on road debris. While there’s no ‘ergonomic’ aspect in the way one might think of a hand tool, the thoughtful inclusion of all necessary hardware and clear instructions makes the installation process as ‘ergonomic’ as possible for a DIY electrical project.

Durability & Maintenance

Based on my extended use, the durability of this diode kit appears to be excellent. The heat-sealed diodes are a standout feature; this method of encapsulation typically provides superior resistance to environmental factors compared to simple potting compounds or heat shrink tubing applied over bare connections. I’ve encountered no signs of wear, cracking, or corrosion on any part of the kit.

Maintenance is, thankfully, minimal. A periodic visual check for any physical damage or loose connections is all that’s really needed. The components are designed to be largely ‘set and forget’. If a diode were to fail (which, given the quality, seems unlikely under normal operating conditions), it would require cutting and splicing in a new one, as they are not user-serviceable in that regard. However, the 16-gauge wire is robust enough that it’s unlikely to be the failure point before the diodes themselves.

Accessories and Customization Options

The Dethmers Manufacturing Company 9523010 Demco Towed Vehicle Tail Light Wiring Diode Kit comes as a complete package, including all the essential accessories for installation. The inclusion of 4 heat-sealed diodes, 26 ft. of 4-conductor 16-gauge wire, a generous supply of butt connectors, and ring terminals covers the core electrical connection needs. The nylon ties are a thoughtful addition for organization.

While this kit isn’t designed for extensive customization in terms of component upgrades, its strength lies in its completeness. The 16-gauge wire offers a good balance of conductivity and flexibility, and the diodes are sealed units. For users, the primary ‘customization’ would involve how they route and secure the wiring, which the included ties facilitate. It’s designed to integrate seamlessly, not to be heavily modified.

Pros and Cons of Dethmers Manufacturing Company 9523010 Demco Towed Vehicle Tail Light Wiring Diode Kit

Who Should Buy Dethmers Manufacturing Company 9523010 Demco Towed Vehicle Tail Light Wiring Diode Kit?

This Demco diode kit is an excellent choice for any owner of a motorhome or RV who frequently tows a smaller vehicle, such as a car or a light utility trailer. It is particularly well-suited for those who have experienced intermittent lighting issues, dashboard warning lights related to trailer lights, or are concerned about protecting their vehicle’s sensitive electronics from electrical feedback. DIY enthusiasts with basic automotive electrical knowledge will find the installation straightforward and rewarding.

Conversely, individuals who are not comfortable with any form of automotive wiring, or who have a towed vehicle with an exceptionally complex or high-demand lighting system (e.g., extensive LED arrays that draw significant current), might want to consult a professional installer or explore more heavy-duty solutions. For most standard towing applications, however, this kit hits a sweet spot. You might consider picking up some extra butt connectors or ring terminals if you anticipate needing to extend the wire significantly or make multiple connection points, but the included amount is generally sufficient.

Conclusion on Dethmers Manufacturing Company 9523010 Demco Towed Vehicle Tail Light Wiring Diode Kit

The Dethmers Manufacturing Company 9523010 Demco Towed Vehicle Tail Light Wiring Diode Kit has proven to be a reliable and effective solution for a common towing problem. Its robust construction, particularly the heat-sealed diodes and 16-gauge wire, inspires confidence in its longevity and performance. The kit’s comprehensive inclusion of all necessary hardware significantly streamlines the installation process, making it accessible for many DIYers.

At $129.99, it represents a solid investment in protecting your valuable motorhome and towed vehicle from potentially costly electrical damage. The peace of mind that comes from knowing your lighting systems are properly isolated and functioning correctly is, in my experience, well worth the price. I would confidently recommend this Demco diode kit to any RV owner looking for a durable and effective way to ensure safe and reliable lighting when towing.