Select Your Vehicle
view cartView Cart
Only 18 Hours 39 Minutes Remaining

Wiring Diagram for a 7-Way Round Pin Trailer Connector on a 40 Foot Flatbed Trailer

Question:

I need to see a wiring schematic to wiring a 1985 40 ft flatbed trailer. I have seven pin round connector. What I need to see is where each wire goes and how it is connected to the lights on the trailer. Is there a book or easy diagram to follow?

asked by: Herbert


Expert Reply:

I do have a handy trailer wiring FAQ article that would be perfect for you. I have included a link to it. I have also included a picture that shows the typical wiring diagram of a 7-Way round pin trailer side connector. As you can see, the 7-way round pin trailer connectors do not use the typical pin functions. The round pin style connectors are typically used on heavy-duty trucks which are wired differently from typical RV or equipment style trailers. You can wire a 7-way round pin connector any way you want, you just want to make sure it matches the 7-way round pin connector on your truck.

You can also use Jacketed 7 Wire, # DW04914-1, if you need to replace the wiring on the trailer. This wire is sold in 1 foot increments.

expert reply by: Michael H




Have a question for the experts? click here.


Products Referenced in This Question

Deka Wire - Jacketed 7-Wire - per Foot


Deka Wire - Jacketed 7-Wire - per Foot

ratingratingratingratingrating
35 reviews

DW04914-1

Price:  $2.07

Product Summary:

Wiring
Accessories
12 Gauge
7 Wire

Product Specs:

Wire
Jacketed Wire


more information        





Product Page this Question was Asked From

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


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

ratingratingratingratingrating
16 reviews

PK11700

Retail: $11.28

Price:  $8.99

Product Summary:

Trailer Connectors
Trailer End Connector

Product Specs:

Plug Only
7 Round


more information        







More Answers about Wiring

Featured Help Information

Trailer Wiring DiagramsTrailer Wiring Diagrams
Trailer Wiring Diagrams






Stay Connected


Subscribe to email newsletter

Email  

privacy - we don't send unsolicited email





Only 18 Hours 39 Minutes Remaining

etrailer.com reviewsetrailer.com reviews

All images, layout and content copyright etrailer.com