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Parts Needed For Connecting Trailer 7-Way to Vehicle With 4-Way Flat Connector  

Updated 09/06/2022 | Published 09/03/2022



Question:

Have a 4flat trailer wire harness connector on vehicle Have a trailer with 7 round plug Dont need anything but lights on trailor Do u make an adapter to plug into 4flat receptor to accept a 7 round plug

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Expert Reply:

The Adapter 4-Pole to 7-Pole and 4-Pole # 37185 will allow you to connect the 7-way round blade plug to your vehicle with only a 4-way flat connector. Do understand that any electric brakes, reverse lights, and charge line will not be able to get any power with this type of connection.

If your trailer connector has round pins inside the connector you will need the Custer Trailer Connector Adapter - 4-Way Flat to 7-Way Round # KIT-7P-4. This kit again will not include wiring for electric brakes, reverse lights or a charge line.

The Wiring Kit # 5506 will allow you to connect additional wiring for a charge line and Brake Controller # 90195 with either adapter above.

expert reply by:
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Bud M

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