Does the Pollak Single-Pole Trailer Connector Provide a Ground Connection
Updated 02/05/2026 | Published 09/28/2012
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Question:
Does the sheild connect the ground or should i get a 2-pole instead to connect negative and positive to the battery?
asked by: Nick
Expert Reply:
The # PK11851 Single Pole Round Pin Trailer Connector is designed to deliver power to a trailer. It is not grounded, as the battery on the tow vehicle is already grounded and trailer mounted equipment is typically grounded as well. The ground connection would typically be carried through an additional connector, depending on the piece of equipment you are supplying power to you might need to increase the ground wire gauge.
If you need the connector to power a winch, you would be better off using a wiring kit with a quick disconnect like part # BDW20206.
You could also use a two pole connector, # PK12801 for the vehicle side and # PK12800 for the trailer side.
Product Page this Question was Asked From
Pollak Single-Pole, Round Pin Trailer Wiring Socket - Vehicle End
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- 1 Round
- Plug Only
- Pollak
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Chris F.
2/5/2026
I am having an issue with my dump trailer. My battery recently started dying so before buying a new one , i started testing the plug , socket and wiring.. so when my socket is mounted , im only getting 9v out of to back but if i remove it from the trailer and plug it back in , i get my 14v back .. any ideas ?