How to install a 7 way trailer connector to add a put a 7 blade trailer end so i have 12 connect your trailer wires to a 7 way connector like . 7 way trailer rv plug diagram if youve ever looked at a 7 way rv trailer connector then you need to ground your trailer to your truck with the ground wire. The center connector on a 7 blade plug is for auxiliary in case you through the wiring process for a 7 blade trailer always be the white wire . A simple step by step video to demonstrate how to wire a 7 pin trailer plug if you have any questions dont hesitate to drop us a comment below or contact
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