Parts Needed To Add 7-Way And Brake Controller To A 2003 Honda Odyssey
Updated 04/30/2026 | Published 04/25/2026
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Question:
Hi I am looking for a 7 pin wiring harness for a 2003 Honda odyssey for a camper with electric brakes.preferably an easy connect. Can you pleas advise? Thanks Rich
asked by: Richard H
Expert Reply:
Hey Richard, thanks for reaching out. We do have a way to add a 7-pin plug and electric brake controller to a 2003 Honda Odyssey. Here is what you can use:
- Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C55336
- Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires # ETBC7
The 4-flat portion is a simple plug-in harness. There isn't a custom plug-in option for the 7-way though, so the # ETBC7 kit is the only option for that. It's not terribly difficult to install, but you do need to run wires to the battery and to the brake switch. I have linked an install video below which you should find most helpful.
Both of those kits combined contain everything you need to add a 7-way, including all the necessary wires for a brake controller. For that I recommend the Redarc Tow-Pro Liberty # RED52VR. Its solid, dependable and really easy to use.
What kind of trailer will you be towing?
Product Page this Question was Asked From
Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- Converter
- No Tow Package
- 4 Flat
- Plug and Lead
- Plug-In
- Hidden
- CURT
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Trukntigger
4/29/2026
Odd to add an electric brake to that vehicle due to most trailers with electric or surge brakes for that matter normally exceed 2500 lbs or better towing weight. Doubtful without full factory tow package you can tow much more than 3500 (max rating stock on my 2004 Honda Pilot alone the Odyssey Van). Any more weight need the extra transmission cooler and heavier frame hitch and total weight when factory rates this must include vehicle and trailer content weight loaded into said platforms. This stated you will be adding the electrical braking kit separate then the two merge at rear for the 7 pin output. Not a horrid hard job but almost better off if under that 3500 lbs and not like super hilly use adaptor 7 to 4 and plug in as is basically deleting/bypassing the brake feature. Laws do vary state to state but rule thumb is around 3000/3500 lbs need trailer brake, below that is optional.