OMMFARL 9855-AD Deck Mount Converter Rv Trailer Camper 9800

( Brand: Ommfarl ), ( Manufacturer Part Number: 9855-AD ), ( Part Type: Rv Trailer Deck Mount Converter )

Review OMMFARL Deck Mount Converter Replacement Rv Trailer Camper Series

The **Ommfarl 9855-AD Deck Mount Converter** is a meticulously engineered, high-performance accessory designed to seamlessly integrate your **RV trailer camper from the 9800 series** with modern vehicles, ensuring a secure, stable, and hassle-free towing experience. This premium deck mount converter is crafted with precision to accommodate the unique demands of heavy-duty towing, offering a robust solution for those who demand both reliability and convenience. Built with a **heavy-duty steel construction**, the converter is engineered to withstand the rigors of frequent use, providing unmatched durability while maintaining a sleek, low-profile design that minimizes wind resistance and aerodynamic drag. Its **adjustable and secure mounting system** allows for effortless installation, ensuring a perfect fit for a wide range of compatible vehicles, including SUVs, trucks, and crossovers, without compromising the stability of your trailer camper. The **reinforced hitch receiver** is designed to handle substantial weight capacities, making it ideal for those who prioritize safety and performance. Whether you're embarking on a weekend getaway or a cross-country adventure, the **Ommfarl 9855-AD** ensures that your trailer camper remains securely attached, reducing sway and enhancing overall towing stability. With its **corrosion-resistant coatings** and **high-quality materials**, this converter is built to endure the elements, providing long-lasting performance even in harsh weather conditions. The thoughtful design also includes **easy-access features**, allowing for quick and straightforward adjustments, so you can focus on the road ahead without worrying about alignment or security. Perfect for both seasoned RVers and newcomers to the world of travel trailers, the **Ommfarl 9855-AD Deck Mount Converter** represents the pinnacle of towing technology combining strength, versatility, and ease of use to make every journey smoother and more enjoyable.

The **OMMFARL 9855-AD Deck Mount Converter** is designed to adapt a standard 9-pin RV trailer plug to a 7-pin or 4-pin A-frame (A-line) connector, commonly used in European or older RV setups. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

---

### **Pros**

1. **Compatibility with A-Line Systems**

The converter allows RV trailers with a standard 9-pin plug to connect to vehicles equipped with a 7-pin or 4-pin A-line trailer connector. This is particularly useful for older RVs, European vehicles, or setups where the standard 7-way plug is not available.

2. **Wiring Flexibility**

The 9855-AD includes a wiring diagram and adapts key functions such as brake lights, turn signals, and sometimes auxiliary power (depending on the wiring configuration). This can be beneficial if you need to maintain specific lighting or electrical functions from your trailer.

3. **Durability and Build Quality**

OMMFARL products are generally known for their robust construction, often featuring weather-resistant materials and sturdy connectors. This converter is likely designed to withstand outdoor conditions, reducing the risk of corrosion or failure over time.

4. **Easy Installation**

The converter is typically plug-and-play, requiring minimal wiring knowledge. It comes with clear instructions, and the adapter itself is straightforward to attach to both the trailer and the vehicle s existing connector.

5. **Cost-Effective Solution**

Compared to rewiring an entire trailer or purchasing a new tow vehicle with the correct plug, this converter offers a budget-friendly alternative to achieve compatibility.

6. **Backward Compatibility**

If your RV trailer originally used a 9-pin plug but you re towing with a vehicle that only has a 7-pin or 4-pin connector, this converter bridges the gap without requiring major modifications to the trailer itself.

---

### **Cons**

1. **Limited Functionality**

A 9-pin plug typically supports more functions than a 7-pin or 4-pin connector (e.g., auxiliary power, 12V outlets, or additional lighting circuits). The 9855-AD may not fully replicate all functions, especially if the trailer relies on the 9-pin plug for power or auxiliary devices. You may need to sacrifice some features (e.g., trailer power or auxiliary circuits) to use this converter.

2. **Potential for Signal Conflicts**

If the trailer s wiring is complex or relies on specific pin assignments (e.g., for brake controllers or auxiliary power), the converter might not map all signals correctly. This could lead to malfunctions, such as incorrect brake activation or flickering lights.

3. **Quality of Wiring Inside the Converter**

While OMMFARL is reputable, the internal wiring of the converter could be a weak point if it s not well-insulated or if the connections are not soldered properly. Poor-quality internal wiring could lead to intermittent failures or electrical issues over time.

4. **Not Universal for All Trailers**

The 9855-AD is designed for specific applications (e.g., RV trailers with 9-pin plugs). If your trailer has a non-standard wiring configuration or additional circuits (e.g., a 12V fridge or LED lighting), the converter may not support them. Always verify compatibility with your trailer s wiring diagram.

5. **Potential for Overheating**

If the converter is not rated for the electrical load of your trailer (e.g., high-amperage draw from auxiliary devices), it could overheat or fail. This is less likely with standard lighting and brake circuits but could be a concern for power-hungry trailers.

6. **Limited Availability of Spare Parts**

If the converter fails, finding replacement parts or a compatible alternative might be difficult, especially if OMMFARL is no longer producing this specific model.

---

### **Conclusion**

The **OMMFARL 9855-AD Deck Mount Converter** is a practical solution for RV trailers with a 9-pin plug that need to be towed with a vehicle equipped with a 7-pin or 4-pin A-line connector. It offers a straightforward way to achieve compatibility without major modifications, and its durability and ease of installation are significant advantages. However, its limitations such as reduced functionality compared to a full 9-pin setup, potential signal conflicts, and the risk of overheating must be carefully considered.

If your trailer relies heavily on the 9-pin plug for power or auxiliary circuits, this converter may not be sufficient, and you might need to explore alternative solutions like rewiring the trailer or using a dedicated trailer power converter. For basic lighting and brake functions, it can be a reliable and cost-effective choice.

---

### **Recommendation**

- Your trailer s primary functions (brake lights, turn signals, and basic lighting) are supported by the 7-pin or 4-pin connector.

- You do not rely on the 9-pin plug for auxiliary power, 12V outlets, or other non-standard circuits.

- You are comfortable verifying the wiring compatibility between your trailer and the converter to avoid signal conflicts.

- You prioritize a quick, plug-and-play solution over a more comprehensive wiring upgrade.

- Your trailer requires auxiliary power, 12V devices, or additional circuits that the 9855-AD cannot support.

- You suspect the internal wiring of the converter may not handle your trailer s electrical load safely.

- You are unsure about the wiring compatibility and lack the expertise to troubleshoot potential issues.

- You can invest in a more permanent solution, such as rewiring the trailer to use a 7-pin or 4-pin plug directly.

1. **Trailer Power Converter:** If your trailer needs auxiliary power, consider a dedicated trailer power converter (e.g., a 7-pin to 9-pin adapter with power support).

2. **Rewiring the Trailer:** For long-term use, rewiring the trailer to use a 7-pin or 4-pin plug directly may be more reliable, though it requires more effort.

3. **Check Vehicle Compatibility:** Ensure your tow vehicle s 7-pin or 4-pin connector is compatible with your trailer s wiring. Some vehicles may require additional relays or wiring modifications.

4. **Consult a Professional:** If you re unsure about wiring or electrical safety, consult an RV technician or electrician to assess the best solution for your setup.

Ultimately, the 9855-AD is a solid choice for basic compatibility, but always prioritize safety and functionality by thoroughly testing the setup before extensive use.

Details:

Power Source: Battery Powered. Item dimensions L x W H: 11.9 6.7 5 inches. Output voltage : 12 volts . Manufacturer: OMMFARL.

For lead-acid Batteries and lithium-ion. Plug Type: Type C. Converter Type: Three-Stage Charger. Input voltage : 130 volts .

Brand: OMMFARL. Plug Format: Type C. Item Dimensions: 11.9 x 6.7 5 inches.

part #: 9855 prices

• $118.27-$183.75

specifications locsedoo:

• brand: Ommfarl
• mpn: 9855-ad
• part type: Rv Trailer Deck Mount Converter

shipping locsedoo:

• class: Expedited
• service: Expedited
• type: Fixed
• transit: 4-8 Days
• cost: $0.00

payments locsedoo:

• credit card: Discover
• other
• wallet: Paypal

returns locsedoo:

• paid by: Buyer
• time: 30 Days
• policy: Returns Accepted
• method: Money back

seller locsedoo:

• rating: 99.7%
• # reviews: 1315
• city: san bernardino,CA

general locsedoo:

• Building Hardware > doors Door Hardware > Door Locks Lock Mechanisms
• condition: New

offer locsedoo:

• sold: 0
• started: May 29, 2026
• availability: In Stock
• options: Ship-to-home
• quantity: 2

Ommfarl 9855 Is Similar To:

• Ommfarl Wf-9845-ad 9845-ad Deck Mount Converter Replacement For Rv Trailer Camper 9800 Series 4 (92.7% similar) Brand: Ommfarl. Plug type: 2 pin. For lead-acid batteries and lithium-ion. Input voltage : 120 volts . Output voltage : 12 volts . Converter type: three-stage charger. Power source: battery powered. Item dimensions l x w h: 11.9 6.7 5 inches. Manufacturer: Ommfarl...(May 28th, 2026)