Wiring Diagrams for 7-Way Round Trailer Connectors

Published 12/26/2014

Question:

Im looking at my 7 pin cast body pollak round pin receptacle vehicle side pin labels on the screw side of the terminals and they are labeled differently than in your color diagram. The male trailer side plug is correctly labeled but the body side connector has the yellow and green wires reversed in position. For that matter - black and brown are reversed also....unless that view is supposed to be down the barrel of the connector, in which case, for clarity, the screws should not be shown. Sorry to be picky but I was wondering about this for some time before I figured it out. Happy Holidays

asked by: David H

Expert Reply:

I attached a diagram that shows how most 7-way rounds like the # PK11720 that you referenced will get wired up.

As long as you got yours wired up correctly and your trailer taillights and brakes are functioning correctly that's all that should matter, but occasionally there are some trailers that end up wired slightly different than others so the diagrams we offer don't match up perfectly. In those cases you have to wire up everything by function so that everything matches up properly. Otherwise you will have to rewire up the trailer or vehicle so that it matches the standard wiring diagrams.

expert reply by: Jameson C