Tow Bar and Wiring Harness Recommendation for a 2003 Land Rover Discovery  

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I did some research on your 2003 Land Rover Discovery and I could not find any information regarding the ability to flat tow your vehicle. I recommend checking your owners manual to make sure it is safe to flat tow your vehicle behind your motor home. Vehicle manufacturers will often place restrictions on vehicles when towing them behind another vehicle or motor home.

If you find that it is okay to tow your Discovery, then you will need tow bar wiring like the Roadmaster Universal Wiring Kit, # RM-154. This system uses 4 Hy-Power Diodes to prevent any back-feeding to the vehicles electrical system. I have attached a diagram that shows how to wire the # RM-154 kit to your vehicle.

You will not want to install a trailer wiring harness like the Curt harness, # C59496. The purpose of a trailer wiring harness is to power lights on a trailer that is towed behind your Land Rover, not the tail lights of the Land Rover.

For a tow bar, you can use a tow bar that does not come with wiring because the Roadmaster wiring kit # RM-154 comes with all of the wiring that you will need. At this time we do not offer a tow bar with a 4-wire setup. The important factor to consider when choosing a tow bar is that the weight capacity of the tow bar exceeds the weight of your Land Rover Discovery. Based on my research, your Discovery weighs approximately 4,500 lbs without any cargo loaded in the vehicle. I would recommend looking at the Roadmaster Falcon 6,000 lb Tow Bar, # RM-520, or the Blue Ox Alpha 6,500 lb Tow Bar, # BX7380, depending on the brand of the base plates that you choose.

In addition to a tow bar, you will need safety cables. The Blue Ox Alpha comes with safety cables, but if you choose a tow bar without safety cables, I recommend part # RM-643.

If you have not already purchased a base plate kit or a supplemental braking system for your vehicle, then I can recommend some options for you. For a base plate kit, you can choose from the Roadmaster XL Base Plate Kit, # 1910-1, or the Blue Ox Base Plate Kit, # BX2902.

For a supplemental braking system, I recommend either the Roadmaster InvisiBrake, # RM-8700, or the Blue Ox Patriot, # BLU37TR. The InvisiBrake is a great option if you plan on towing your Land Rover frequently. It will only need to be installed once and it does not need to be set or adjusted for each trip. It will permanently install out of sight under a seat or in the rear cargo area. The Blue Ox Patriot is a removable unit that is easy to set up and use and does not require a permanent installation.

I have attached links to each of the products that I have referenced for you to check out as well as a few help articles on flat towing. If you are new to flat towing, these help articles will provide useful information that you may not be aware of.

expert reply by: John H

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