How to Adapter 5-Pin Round Trailer Connector to 7-way Connector on Tow Vehicle

Question:

Need adapter to go from round 5 pole trailer plug to my vehicle that has 7 wire and 4 wire flat receptical

asked by: Brian

Expert Reply:

The 5-pin round connector is kind of an oddball that isn't often used as a trailer connector, therefore there isn't an adapter available.

Honestly, your best bet would be to replace the existing 5-pin connector on your trailer with a 7-way, which would be pretty simple to do. You'd start by determining which circuit on your 5-pin serves which function.

For the cleanest installation, I'd use a 7-way molded connector/ junction box like # HS381-9000 which allows you to make your wiring connections in an easily accessible spot that's protected from the elements.

expert reply by: Mike L