Recommended 7-Way to 4-Way Adapter w/a Built in Resistor

Updated 10/27/2025 | Published 03/23/2025

Products Featured in This Question

7-Way to 4-Way/5-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs

(138)

$27.32

Stealth Hitches Hidden Rack Receiver - Custom Fit - 2"

(34)

$668.00

Towing Kit w/ Ball Mount and Trailer Wiring for Stealth Hitches Hidden Rack Receiver - 2" Ball

(37)

$479.00

Question:

Hi there I recently had an trailer electrical system installed on my Volvo xc90 recharge. its the stealth hitch kit. The dealer said that I need to get a 7 pin to 4 pin adapter with a built in resistor for it to work. do you recommend one of your adapters for this?

asked by: James K

Expert Reply:

Yes, we do James! You'll want the 7-Way to 4-Way Trailer Adapter for Vehicles with Lamp-Out Sensors item # C35FR. This will convert the 7-Way connector on your Volvo's Stealth Hitch item # SH27FR and item # SH36FR to work with a 4-way connector.

If you have any additional questions feel free to throw them into the comment box below and I'll be happy to help you!

expert reply by: Jerred H

7-Way to 4-Way Adapter
(click to enlarge)

Jerred H.

10/27/2025

Hey James, how did the 7-way to 4-way adapter work with your Volvo’s Stealth Hitch setup? Your experience could point others in the right direction.

James K.

10/27/2025

@JerredH. It was perfect! The Volvo dealership installed a controller and this 7 way to 4 way adapter worked perfectly. The Volvo displays that a trailer is attached and disables some of the auto pilot and lane detection settings. Thank you!