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Detailed Breakdown of the 4-Way Wishbone Trailer Wiring Harness with 42" Ground Wire 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

34 reviews


Code: A40W42B

Price:  $40.83
  • 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 >     


Review of Optronics Wiring A40W42B


Today we're going to be taking a look at the Optronics 4-Way Wishbone Trailer Wiring Harness. Now this wishbone style harness is going to contain two separate taillight wires. That's going to be the brown wires. One is going to be bundled with the left turn and brake wire which is the yellow wire, so you can see how those two are bundled together. The other brown wire is bundled with the green… see more >