Difference Between Hopkins 37185 and 47185 4-Pole to 7-Way Trailer Connector Adapters
Question:
I am converting my 4-pin to 7 pin on my 2005 F-150 Crew Cab. Will part#47185 work or should I stick with part #37185? Thanks
asked by: John B
Expert Reply:
The part we offer as # 37185 is actually sold by Hopkins as part # 47185 so it's the same exact part. Your truck is prewired for a brake controller installation, but the wiring isn't ran all the way to the bumper. The wiring stops on the driver's side frame rail.
Follow your 4 pole connector to where it plugs into the body harness on the frame rail. The harness feeding that connector from the front of the vehicle will have an orange wire that carries 12-v for trailer accessories and the blue wire for the brake controller output. The blue wire in that harness would connect with the blue wire on the # 37185 adapter, and the black adapter wire connects to the orange wire in the body harness. I'll link to a help article that explains this further.
I've also linked to a video showing a typical installation, which you might find helpful.
Product Page this Question was Asked From
Adapter 4-Pole to 7-Pole and 4-Pole
- Trailer Wiring
- Wiring Adapters
- Multi-Function Adapter
- 4 Flat
- Plug and Lead
- 4 Flat
- 7 Round - Blade
- Hopkins
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: Brake Controller
- Shop: Adapter 4-Pole to 7-Pole and 4-Pole
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Shop: Tekonsha Prodigy P3 Trailer Brake Controller w/ Custom Harness - Up to 4 Axles - Proportional
- Shop: Trailer Hitch
- Shop: Towed Vehicle Battery Charge Line Kit for Demco Air Force One and Stay-IN-Play Duo Braking Systems
- Shop: Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers - Ford, Lincoln, Mercury
- Shop: Reese Multi-Plug Wiring Harness for Factory Tow Package - 7-Way and 4-Way Flat Trailer Connectors
- Shop: Tekonsha Prodigy P3 Trailer Brake Controller - 1 to 4 Axles - Proportional
- Video: How to Choose a Trailer Brake Controller
- Search Results: 47185
- Search Results: hopkins 47185 multi tow adapter
- Search Results: pintle hitch
- Video: How to Install: Adapter 4-Pole to 7-Pole and 4-Pole on your 2009 Ford Van
- Video: Detailed Breakdown of the Buyers Products Trailer Connector Adapter
- Video: DIY Install: Adapter 4-Pole to 7-Pole and 4-Pole on your 2011 Ford Van
- Video: In-Depth Review of the Universal Installation Kit for Trailer Brake Controller
- Search Results: trailer wiring
- Search Results: tekonsha 3035~p
- Search Results: 37185
- Search Results: wire
- Video: Let’s Check Out the Curt Universal Installation Kit for Trailer Brake Controller
- Shop: Suspension Enhancement
- Video: Bearing Buddy Bearing Protectors-BB1980A-SS Spec Review
- Q&A: Installing A Reese Brakeman Controller In A 202 Ford E250 With Factory 4-Flat
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: Brake Controller Installation on a Full-Size Ford Truck or SUV
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Q&A: Trailer Wiring Harness for a 2010 Saturn Outlook without Factory Tow Package
- Q&A: Which Trailer Wiring Option for 2009 Saturn Outlook
Brian
5/24/2024
Hi Mike - 1996 ford f350 reg cab dually 7.5l gas w/ Factory tow package and 4 pin tow connector. 4 pin works great. Found the yellow 12v you refer to on the driver frame rail at the rear of truck but it has no power. The 30A fuse in slot 18 is good. Anything else I should check? Or do you have any articles you'd suggest? Also, where to hook 7 pin into truck if factory blue isnt powered? Thanks!