Does Trailer Hitch and Wiring Communicate With the Engine and Transmission on Volvo XC 90

Question

Question:

We are looking to install a 3500# trailer hitch Class III on our 2007 Volvo XC90 and have been told that these vehicles need to have a Volvo factory supplied trailer hitch and wiring due the need for a special Volvo module that not only does what your product does but communicates with the engine and transmission to change shift points and engine torque curves. We also would like to have an electric brake controller but have been told that Volvos can not have them due to not having appropriate wiring accomodations up front under the dash. If you could answer these, it sure would make things a whole lot less stressful.

asked by: Leo M

0

Expert Reply:

Your Volvo XC90 will require the T-One Vehicle Wiring Harness with 4 Pole Trailer Connector, item # 118411. This wiring harness will protect your vehicle's sensitive wiring and computers from electrical shorts and mis-wired trailers.

There is no wiring harness for trailer towing that communicates with the vehicle engine or transmission. The trailer wiring cannot communicate trailer weight or any other information to the vehicle. Your vehicle powertrain control module (PCM computer) senses that a change needs to be made, to shift point or engine torque curve, based on the amount of stress and fuel demand the vehicle is experiencing at any given time.

You can install a Brake controller on your vehicle but it will need to be hard wired. We have all the components needed for the installation in our Brake Controller 7 and 4 Way Installation Kit, item # ETBC7. This kit will use the 4-Way connector mentioned earlier and you will need to run the additional wiring needed for your trailer. Along with this kit you will need a brake controller and I would recommend the Tekonsha Prodigy, item # 90185, which is our best selling brake controller.

We have several hitches available for your vehicle (see link) and I recommend the etrailer Class III Trailer Hitch, item # e45KR, for your vehicle. This hitch is easily installed with no drilling required. Curt, item # C45010, is recommended for your vehicle, with this hitch, and you will also need a properly sized hitch ball (see link).

expert reply by: Robert G

0

Answer 1

I honestly haven't heard of this type of issue before. Just to be clear, when you just have the light on in your Volvo the trailer lights work perfectly but when you actually start the vehicle the running lights stop working? If this is the…

view full answer...

Answer 2

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

view full answer...

Answer 3

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

view full answer...

Answer 4

Yes, we do. To add a hitch to your 2024 Toyota Grand Highlander, I recommend the Curt Trailer Hitch item #C26VV. This hitch is custom fit and bolts to your Toyota with included hardware. This is a class III hitch with a 2" receiver. It has a…

view full answer...

Answer 5

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

view full answer...

Answer 6

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

view full answer...

Answer 7

To add a hitch to your 2024 Toyota RAV4, I recommend the etrailer item #e23ZR. This hitch is custom fit and bolts to your Toyota with included hardware. This is a class III hitch with a 2" receiver. It has a 4,000 lbs towing capacity, and a 600…

view full answer...

Answer 8

Class I and Class II hitches both have a 1-1/4 inch receiver opening. The difference is that a Class I hitch has a lower tongue weight rating, usually 200 pounds and a lower towing rating, usually 2,000 pounds. A Class II hitch usually has a tongue…

view full answer...

Answer 9

As far as wiring for the 2024 Toyota Grand Highlander, we do have the Curt #C59236 available which is more of a universal hardwire harness. Unfortunately there are not any plug-and-play options that have been confirmed to fit as of yet (October 4,…

view full answer...

Answer 10

Yep, so long as your 2024 Subaru Crosstrek Wilderness is not a hybrid both the Curt and etrailer hitches will fit: - Curt Trailer Hitch Receiver #C13382 - etrailer Trailer Hitch Receiver #e98912 The only difference besides price is the finish; the…

view full answer...

Answer 11

I definitely understand being a bit overwhelmed by the amount of options in front of you, however I can definitely help with differentiating the trailer hitches for your 2019 Subaru Outback Wagon along with explaining my personal recommendation,…

view full answer...

Answer 12

Lance does have a proprietary plug, but many customers see a standard 6-way or 7-way round and notice it doesn't fit their factory 7-way as well. I've attached an article to help if you have one of the 7-way or 6-way round connectors which we…

view full answer...

Does Trailer Hitch and Wiring Communicate With the Engine and Transmission on Volvo XC 90

Products Referenced in This Question

Product Page this Question was Asked From

Featured Help Information

Instructions

Miscellaneous Media

Continue Researching