Recommended 7-Way Connector for a 1999 Ford F-350 w/a Rectangular Plug

Updated 10/27/2025 | Published 03/24/2025

Question:

I was looking at product HM40975. I have a 99 f-350 and some products say there were two kinds of connectors for that year. My vehicle has a rectangular connector at the rear for the 7 way wiring. Is there a harness I can buy that will plug into vehicle and plug into this trailer plug. I am also interested in a gooseneck plug to run into the bed. If you could point me in the right direction I’d appreciate it. Thanks

asked by: Robert

Expert Reply:

Hey Robert! Thank you so much for that information! We do have a 7-way connect that plugs into a rectangular one for your 1999 Ford F-350. It is the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package item # C55243.

To add a gooseneck plug to your truck bed you'll want the Hopkins Endurance 5th Wheel/Gooseneck 90-Degree Wiring Harness with 7-Pole Plug item # HM40157.

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

1999 Ford F-350
(click to enlarge)

Jerred H.

10/27/2025

Hey Robert, how did the Curt T-Connector and the Hopkins gooseneck wiring harness work out on your F-350? Your update could make it easier for the next person wiring a similar setup.