Recommended Female Semi-Trailer Connector

Updated 05/13/2016 | Published 05/11/2016

Products Featured in This Question

Pollak Heavy-Duty, 7-Pole, Round Pin, Trailer Wiring Connector - Trailer End

(120)

$18.88

12 Gauge 7 Conductor Jacketed Wire - Per Foot

(505)

$9.92

Pollak Heavy-Duty, 7-Pole, Round Pin Trailer Wiring Socket - Vehicle End

(148)

$13.58

Question:

Several years ago I built a trailer light and brake tester for my RV. It is a full function unit, using all 7 flat pins. I also use it on our cargo and car trailers. I have a friend who wants to use it on semi-trailers. I have considered selling them. What I need is the right cable end to go into a conventional semi-trailer. I am an experienced automotive electrician. If you guys sell these plugs, please point me in the right direction. Any help would be most appreciated.

asked by: Lyle D

Helpful Expert Reply:

Sounds like you are looking for the trailer end plug for your tester that will fit into semi-trailers.

Most commercial trailers will use a 7-way heavy-duty pin setup like # PK11720. The female matching connector for this is the # PK11700 you were looking at. To wire this up to your tester I recommend a length of jacketed 7-wire # DW04914-1, this is sold per foot.

You will also want to verify the pin functions of the trailer, many of the semi trailers are wired with separate wiring, I have linked the wiring diagram to this page for your convenience.

I have linked all the above mentioned products as well as a wiring diagram to this page for your convenience.

expert reply by: Jackie C