7-Way Trailer Connector and Curt C51180 Echo Wireless Brake Controller Install on 2013 Volvo XC90

Question:

Can you confirm the following parts list to set up a 2013 Volvo xc90 to tow a dual axle cargo trailer w/ brakes, 7 pin connector, and LED lights. Curt Trailer Hitch Receiver - Custom Fit - Class III - 2inch - 13559 T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 118411 Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector - 30717 Understand that the ETBC7L kit is normally recommended- is the only difference that the ETBC7L comes with a wire an fuse to hook to the battery? For this part what gauge wire and amp fuse should be used? Mighty Cord Universal 7-Way Mounting Bracket - A10-9394VP Weigh Safe 2-Ball Mount w/ Built-In Scale - 2inch Hitch - 8inch , 9inch Rise - 10K - WS8-2 Will also be used on 2013 Duramax with 2.5in to 2 in adapter The last part of this question is if any additional resistors will be needed since the trailer has LED lights? Thank you!

asked by: Chris F

Expert Reply:

The Curt Class III hitch you referred to, part # 13559 is a confirmed fit for your 2013 Volvo XC90, as is the Tekonsha # 118411 powered taillight converter.

The # ETBC7L provides an adapter that converts the 4 pole provided by the # 118411 into both a 4 pole and a 7-way, as well as 20 feet of 12GA wire, a 40 amp circuit breaker and all the necessary hardware.

If you wish to obtain these parts separately, here's a listing of the part numbers.

• 4-pole to 7-way/4-pole adapter # 37185
• 12 gauge wire, # 12-1-1
• 40A circuit breaker # 9510
• Small ring terminal # 44-5310A (you'll need 2)
• Lg ring terminal # 44-5356A

You won't need the # A10-9394VP bracket, as one's inlcuded with the # 37185, and the # WS8-2 Weigh Safe ball mount would also be a great choice.

You won't need to install load resistors on the turn signal circuits on the trailer UNLESS the vehicle is equipped with a bulb out sensor that makes the turn signals hyperflash when a bulb is out. Because LED's draw only a fraction of the power of an incandescent, the bulb out sensor things that there's a burned out bulb. Installing load resistors like # DI34ZR will fix that issue by increasing the load on the circuit, thus fooling the sensor.

It seems like you've got a handle on what's needed to install a hitch, trailer connector and the Curt
# C51180 Echo wireless brake controller. I'll link to some installation and demonstration videos that you'll find helpful.