Using a 7-Way to 5-Flat Trailer Adapter # HM47675 for Trailer with Electric Brakes
Question:
Im looking at your 7 way to 5 flat adapters. It appears looking at the picture of the 7 way, that the brake contact is missing on all the various models. How do they work the brakes, if the contact is missing. Am I reading the diagrams wrong? Thanks.
asked by: David F
Expert Reply:
The 5th wire on a 5-pole flat trailer connector like the harness # A40W5B can be used for either a reverse lockout function (as on a surge brake coupler) or to deliver a signal for electric brakes. It just depends on how your trailer is wired.
7- to 5-pole adapters like the Hopkins # HM47675 will typically take the 7-way's center pin function and assign that to the 5th pole on the 5-pole output. For an RV-style 7-way this center pin usually carries the reverse light signal, not a brake controller output signal.
You can simply wire a 7-pole trailer plug such as Hopkins # H20042 (3-foot) to your trailer wiring BY FUNCTION using butt connectors. Simply cut off the trailer's 5-pole and wire in the 7-way plug. This will avoid the need for adapters.
A linked article on wiring may be helpful to you.
Products Referenced in This Question
40 Ft 5-Way Trailer Wiring Harness - Wishbone Style - 30" Ground - 5' Auxiliary Wire
- Trailer Wiring
- Trailer Connectors
- Trailer End Connector
- 31 Feet and Longer
- Plug and Lead
- 5 Flat
- Optronics
more information >
7-Way Molded Trailer Wire Connector - 3' Long
- Trailer Wiring
- Trailer Connectors
- Trailer End Connector
- 0 - 5 Feet Long
- Plug and Lead
- 7 Round - Blade
- Hopkins
more information >
Product Page this Question was Asked From
Hopkins Multi-Tow Trailer Connector Adapter - 7-Way to 5-Wire Flat/4-Wire Flat and 12-V Power Socket
- Trailer Wiring
- Wiring Adapters
- Multi-Function Adapter
- 7 Round - Blade
- Plug Only
- 5 Flat
- 4 Flat
- 12 Volt
- Hopkins
more information >
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