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Fit Verified: 4-Way Wishbone Trailer Wiring Harness with 42" Ground Wire on a 1917 Ford Model T Video

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Info for this part was:

Employee Cole B
Installed by:
Cole B
Employee Chris R
Video Edited:
Chris R
Employee John S
Video Edited:
John S
Employee Shane H
Test Fit:
Shane H
Employee Jonathan Y
Video by:
Jonathan Y

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Products Featured in this Video


4-Way Wishbone Trailer Wiring Harness with 42" Ground Wire - 40' Long


Optronics Trailer Wiring

35 reviews


Code: A40W42B

Price:  $43.78
  • Trailer Wiring
  • Trailer Connectors
  • Trailer End Connector
  • 4 Flat
  • Plug and Lead
  • Optronics



This wiring harness provides a simple, efficient method for rewiring your trailer with a 4-pole flat trailer-end connector. The wishbone-style harness has an extra tail light wire that makes it easier to wire your trailer.


Do you have a question about part A40W42B?more information >     


How to Install the Optronics 4-Way Wishbone Trailer Wiring Harness


Shane: Hey guys, Shane here with etrailer.com. Today, I'm going to walk you through how to install the Optronics Four-Pole Wishbone Wiring Harness. This is going to give you new wiring kits to run on your trailer if you're having issues with your lighting functions; wire's just getting old. As you see, we have a boat trailer here. Getting it down on… see more >