Need Replacement For Factory 7-Way On 2005 Ford F-250
Updated 08/07/2025 | Published 07/13/2025
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Question:
The original owner of my 2005 F-250 cut the factory plug off. I am left with bare wires. Can you supply a wiring diagram to direct wire your recommended controller to the factory supplied wires minus the connector?
asked by: Bob W
Expert Reply:
Hey Bob, thanks for reaching out. The best thing to do here will be for you to wire in a standard USCAR connector like part # 20147. This is the same plug that comes standard on most trucks and is likley what the previous owner cut off. Once you wire that in, you can add a new trailer socket like part # HM75MV.
I'm afraid I don't have any diagram for your truck that tells which wires are which. What I would do it take a wire tester like part # PT72PJ or a volt meter and poke around and determine which wire is which. They may not necessarily be color coded.
If your truck came with the factory 7-way it should be equipped with an OEM brake control port under the dash. If so, you can use a custom pigtail to install a brake controller. The Curt TriFlex NEXT # C55MV is what I recommend for that.
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Product Page this Question was Asked From
Curt TriFlex NEXT Trailer Brake Controller w/ Custom Harness - 1 to 4 Axles - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Plug-In
- Under-Dash Box
- Under-Dash
- Up to 4 Axles
- LCD Display
- Single Trailer Only
- CURT
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Jesse M.
8/7/2025
Hey Bob, how did it go with wiring in the USCAR connector and using the wire tester to figure out the wires on your F-250? I'm curious to know if you were able to get everything set up smoothly. Let me know if you need any more help!