What Parts are Needed to Tow With a 2003 Toyota Tundra
Updated 03/16/2010 | Published 03/15/2010 >
Products Featured in This Question
Question:
Hi, I recently purchased a 2003 Toyota Tundra that is equipped with a 4 pin connector. I want to be able to tow so was wondering what do I need to add in addition to a hitch? I know that I'll need a ball mount and hitch ball, and a brake controller. Anything else? Transmission cooler? 4 to 7 adapter?
asked by: Ray F
Expert Reply:
In addition to a hitch like # 13184, I would recommend ballmount # C45010, as this would put your hitch ball at the most common trailer height.
For a more exact ballmount fit, you can measure from the ground to a point just below your bumper. Then, with the trailer level, measure from the ground to the bottom, flat part of the trailer coupler. The difference between the two measurements would be your required rise or drop. For example, if the measurement to the trailer coupler is 19 inches, and the measurement to the underside of your bumper is 22 inches, you would need a ballmount with a 3 inch drop.
A 2 inch hitch ball like # 19247 would be the most common ball size, but you would need to make sure this is the ball diameter your particular trailer would use. The ball size is normally stamped on the trailer coupler.
I have included links to all the compatible ballmounts and hitch balls we offer, in case the ones I have recommended will not work for your needs.
You will also need a hitch pin or lock to hold the ballmount in your hitch. I recommend hitch lock # e98880, as it screws flush against the hitch opening for superior theft deterrence.
If the trailer has electric brakes, a brake controller will definitely be needed. I recommend the Prodigy brake controller # 90885, as it will include a pigtail you will use to hardwire the brake controller to your 2003 Toyota Tundra. The pigtail features 4 wires.
The 4 brake controller wire functions are:
White: Ground, attached to a clean piece of unpainted metal.
Black: 12v lead, attached to the vehicle's positive battery terminal with a 40amp circuit breaker.
Blue: Electric brakes, attached to the blue electric brake wire on the 6 or 7-way plug.
Red: Stoplight switch, normally located directly off the vehicle's brake pedal.
I would also recommend using brake controller installation kit # ETBC7. This will adapt your 4-way plug to a 7-way, and it will include the circuit breakers, additional wire, and various connectors to install the brake controller and adapter on your vehicle. I have included a link to a video demonstrating how the # ETBC7 kit would be installed on a similar vehicle.
A transmission cooler is not always necessary, but you can install one to alleviate some strain on your truck while towing. If the trailer has electric brakes, you will probably need a class III or class IV transmission cooler, depending on the trailer weight.
Safety chains like part # 2118-348-04 would also be a good addition to your towing setup.
If your trailer weighs up to 6000 pounds, I would recommend transmission cooler # D13502. If the trailer weighs more than 6000 pounds, I would recommend transmission cooler # D13504. I have included a link to some information on transmission coolers, and an installation video, if needed.
Product Page this Question was Asked From
Curt Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Trailer Hitch
- For Towing
- Class III
- 500 lbs TW
- 5000 lbs GTW
- 7500 lbs WD GTW
- 2 Inch Hitch
- 750 lbs WD TW
- Concealed Cross Tube
- CURT
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Q&A: Can You Replace The Factory Hitch Receiver On A 2004 Toyota Tundra.
- Q&A: How to Determine If a 2002 Toyota Tundra Has a Towable Bumper
- Q&A: What is the Difference Between the Towable and Non-Towable Bumper on a 2002 Toyota Tundra
- Article: My Trailer Hitch Doesn't Fit
- Q&A: Which SumoSprings Kit Fits 2024 Toyota Tundra with 4 inch Lift
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Q&A: Installation Of Draw-Tite Max-Frame Trailer Hitch Receiver On 2006 Toyota Tundra Double Cab
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: Testing Trailer Brake Magnets for Proper Function
- Article: Our Team Picked The Best Camping Gear of the Year - Here Are Their Top Choices
- Article: Tips on How To Tow a Trailer
- Article: 5 Things to Know About Weight Distribution Hitches
- Article: Which Hitches are Made in the USA






