Will the 7-Way Round Pin to 4-Flat Adapter Work On a Semi
Updated 08/09/2021 | Published 08/07/2021
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Question:
On semi trucks without a trailer, would this adapter allow you to plug in 4-pin tow lights? If so, would brakes, turn, and taillights all work or would one of these functions be lost?
asked by: NLA
Expert Reply:
I do have an option for you but the 7-Way Round Pin to 4-Flat Adapter part # 47405 won't work on semi's as there is no converter integrated into the adapter. The lights on a semi are separate and the lights on a trailer are combined so a converter is required. Therefore, you will have to make your own adapter using the Hopkins Tail Light Converter part # HM48847, 7-Round Connector part # PK11700, and Hopkins Wiring Harness with 4-Pole Flat Trailer Connector part # HM48035.
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