Difference Between 4-Pole to 7-way Wiring Adapters 47180 and 37185
Updated 06/12/2020 | Published 08/06/2017
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Question:
Hopkins shows a 47185 but no 37185 as referenced in your answer. etrailer does show part number 37185. they look to be the same piece.
asked by: Kenny C
Expert Reply:
Hopkins part # HM47180 is a 4-pole-to-7-way wiring adapter that is equivalent to the similar # 37185. The only real functional difference between them is that on part # 37185 the 4-pole trailer connector is located to the side of the 7-way, rather than under it as with # HM47180.
Both adapters plug in at an existing 4-pole vehicle connector and re-format those lighting signals to the 7-way configuration. The 7-way can be wired, if desired, to add new functions by using the included pigtail leads. The usual additional circuits carried on a 7-way that are not carried on a 4-pole are 12V auxiliary trailer power, trailer braking power and reverse lights.
The linked article shows you all types of trailer wiring formats.
Product Page this Question was Asked From
Hopkins Endurance Multi-Tow 4-Way Flat to 7-Way RV Trailer Adapter w/ 4-Way Vehicle End Plug
- Custom Fit Vehicle Wiring
- Wiring Adapters
- Universal Fit
- 4 Flat to 4 Flat
- 4 Flat to 7 Blade
- Plug and Lead
- Hopkins
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Samuel B.
6/8/2020
I'm planning to buy a Jayco Hummingbird travel trailer but my 2015 Honda Pilot EX-L is not equipped with a towing harness. Can you please advise me on what is the most appropriate towing harness that I need to purchase and install? Thank you.