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When your vehicle has a 6-pole round socket but your trailer uses a 4-flat plug, this adapter makes the connection simple. The Pollak 6 Pole to 4 Pole Connector Adapter (part # PK12717) plugs into the 6-pole round on your vehicle and gives you a standard 4-flat output. It links the ground, left turn, right turn, stop, and tail light circuits so your trailer lights work correctly without rewiring anything.
Switching between trailers with different wiring setups doesn’t have to mean rewiring or replacing connectors. This plug-only adapter converts the 6-pole round on your tow vehicle into the common 4-flat used on lightweight utility, boat, and cargo trailers. Just plug it in and you’re ready to tow—no tools or splicing required.
Pollak’s durable connector design maintains a firm fit between plugs to keep the lighting circuits stable on rough roads. With all four essential lighting functions carried through—tail, stop, left turn, and right turn—it keeps your trailer visible and compliant every time you hook up.
Built as a universal adapter, it works anywhere you have a 6-pole round socket and need a 4-flat output. Its small size makes it easy to keep in the glove box or tool kit so you can tow different trailers without hunting for extra parts or rewiring connections.
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews
Greg
6/9/2014
The wiring harness continues to work as I described. It has been durable and weather resistant. I have had it in continuous service for the past year and over 30,000 miles.Overall, it works well and I am pleased.
Terry B.
3/15/2018
Wonderdully
Bill L.
1/6/2015
Works just fine for what it is intended! Quality product at a good price. Even bought an extra just in case...but in case hasnt happened so just have a spare.
Larry
3/15/2018
Still using it one year later. No complaints.
Dan M.
5/8/2015
Perfect...made my life a lot easier when it came to pulling trailers!..On top of the great service when I purchased the item, greta communications as well as a great product!
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Robert
8/22/2025
Excellent,very satisfied.