What is the Function of the 5th Pin on a Trailer Connector 5-Way Flat Connector
Question:
what is the 5th pin on the 5 way plug? I have a trailer with surge brakes and that pin needs to disable the brakes when backing up.
asked by: Troy
Expert Reply:
The 5th wire on a 5-Way flat connector is intended to connect to the vehicle's reverse light circuit. This is for the exact situation you described, so the 5th wire can signal a surge coupler's electric reverse lockout.
If you need a 5-Way flat trailer-side connector, you can use the Draw-Tite 5-Flat Trailer End 48 Inch Harness # 20017. This connector is designed for the 5th wire to carry the reverse light signal from the vehicle to the brake actuator.
The # 20017 connector will work well if you have a 5-Way flat vehicle side connector on your tow vehicle. If you have a 7-Way round, blade-style connector, an adapter like the Optronics Adapter 7 Pole to 5 Pole Flat # A75TB.
If you have a different wiring set-up on your tow vehicle and need to make it compatible with the 5-Way flat wiring on the trailer, feel free to tell me more about your tow vehicle set-up and I will be happy to make a more specific recommendation.
Products Referenced in This Question
5-Flat Trailer End 48" Harness
- Trailer Wiring
- Trailer Connectors
- Trailer End Connector
- 0 - 5 Feet Long
- Plug and Lead
- 5 Flat
- Draw-Tite
more information >
Product Page this Question was Asked From
Hopkins Endurance Multi-Tow 7-, 5- and 4-Way Flat Trailer Connector - Vehicle End - Ergonomic Design
- Trailer Wiring
- Trailer Connectors
- Vehicle End Connector
- Plug Only
- 4 Flat
- 5 Flat
- 7 Blade
- Hopkins
more information >
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on Trailer Wiring
Drew
5/14/2020
I have a similar situation. On my truck, I have a 4 pin flat connector and I need either a 5 pin or a 7 pin. Whichever actuates the reverse lockout.