Looking For Wiring Adapter For 4-Square Plug To 4-Flat Plug
Updated 11/17/2025 | Published 12/13/2024
Products Featured in This Question
Question:
Looking to see if you sell a trailer harness that has the standard 4way flat on one end near coupler and a 4pin square sae on the other end. That connects at the back of the tongue. I can send a picture
asked by: John S
Expert Reply:
Hey John, thanks for reaching out. We do not have any 4-square adapters, or even a 4-square plug for you to make one with. What I recommend doing is replacing your 4-square plug with a standard 4-flat. Use the 4-pole pigtail # HM47115 which has both ends of the 4-flat so just cut off whichever end you need and use it to replace your 4-square. You will want to use some heat shrink butt connectors # DW05744-10 when splicing together your connections for a waterproof seal. The 4-square plugs are not very common these days so this will simplify things for you going forward.
Product Page this Question was Asked From
Extension Cord for ComeUp Winch Hardwired Remotes - 6 Pin - 16" Long
- Accessories and Parts
- Electric Winch
- Wiring
- Extensions
- Plugs
- ComeUp
more information >
Continue Researching
- Q&A: Does the Lid Open All the Way on the Bright Way Push-to-Test Trailer Breakaway Kit When Mounted?
- Q&A: Trailer Running Lights Do Not Work but Brake Lights and Turn Signals Do Work
- Q&A: Replacement Kwikee Linkage and Motor for 26 Series Steps 151320 On 2002 Motorhome
- Q&A: Replacement Hub for Utility Trailer with Dexter 8-256 Hub
- Q&A: What Battery Comes with Bright Way Push-to-Test Trailer Breakaway Kit # 3802311
- Q&A: What Dual Hitch Receiver Can I Use With A Winch And A Trailer With 10,000 lb Gross Trailer Weight
- Q&A: Available Sizes of Winch Roller Fairleads
Jesse M.
11/17/2025
Hey John, how did things go after you replaced the 4-square plug with the 4-flat using the pigtail and heat shrink connectors? Knowing how that setup worked could help others trying to update older trailer wiring.