Parts Needed to Install 7-Way on 2005 Volvo XC70
Updated 01/05/2026 | Published 09/23/2024
Products Featured in This Question
Question:
I have a 2005 Volvo XC70 with a factory tow hitch. I need to install wiring to connect a trailer. I might need the 7-pin wiring to use a trailer with brakes. What install kit can I use on my car to allow me to use either a 4-pin or 7-pin connection?
asked by: Paul P
Expert Reply:
Hey Paul, you would first need to start with a 4-way on your 2005 Volvo XC70 which we have with the part # 46255. Then to convert to a 7-way you'd want the part # ETBC7 which also has a 4-way on the side of it. To operate the trailer brakes you'd then need a brake controller like the P2 part # 90885 and you'd be set.
Product Page this Question was Asked From
Curt Trailer Connector Adapter - 4-Way to 7-Way RV and 4-Way Flat
- Custom Fit Vehicle Wiring
- Wiring Adapters
- Universal Fit
- 4 Flat to 4 Flat
- 4 Flat to 7 Blade
- Plug and Lead
- CURT
more information >
Featured Help Information
Instructions
Continue Researching
- Shop: Trailer Wiring
- Shop: Trailer Hitch
- Search Results: 55245
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Video: Curt Custom Fit Vehicle Wiring - Trailer Hitch Wiring - C56173 Review
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Video: All About the Curt Tail Light Converter with 4-Pole Flat Trailer Connector
- Shop: Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Video: Review of Thule Replacement Buckle Strap - 753-2030-17
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Video: Beginner’s Guide to Installing the Curt Trailer Hitch Receiver on a 2019 Honda CR-V
- Shop: Curt T-Connector Vehicle Wiring Harness with 7-Way Trailer Connector
- Shop: Trailer Hitch Reducer 2" to 1-1/4" Trailer Hitch Receiver
- Video: Beginner’s Guide to Installing the Curt Trailer Hitch Receiver on a 2022 Toyota Highlander
- Video: Curt T-Connector Vehicle Wiring Harness Complete Installation - 2018 Toyota Sienna
- Video: Installing the Curt Trailer Hitch Receiver on your 2022 Mazda CX-5
- Q&A: Instructions to Wire a Trailer for Electric Brakes
- Q&A: Trailer Hitch, Wiring and Ball Mount Recommendation for 2005 Volvo XC70
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: My Vehicle has a 4-Pin Trailer Plug, but Trailer has 7-Pin Trailer Plug
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Article: Trailer Wiring Diagrams
- Article: Brake Controller Installation: Starting from Scratch
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Q&A: Blue Ox Base Plate Kit that Fits 2024 Jeep Gladiator Rubicon with Plastic Bumpers
- Q&A: How to Install a Universal 7-Way Wiring Harness on a 2023 Ford F-150
- Q&A: How Much Weight can the Tie Down Spare Tire Mount - 4, 5, and 6 Lug Wheels Support?
- Article: 5 Things to Know About Weight Distribution Hitches
- Article: How to Choose the Right Trailer Hitch Class
on Custom Fit Vehicle Wiring
Jameson C.
1/5/2026
Hey Paul, how did the wiring setup go on your Volvo XC70 using the 4-way and ETBC7 kit? Your update could make it easier for others wanting both 4-pin and 7-pin connections on similar vehicles.