How to Extend Short Ground Wire on 4-Pole Wishbone Harness
Updated 03/21/2019 | Published 03/20/2019 >
Products Featured in This Question
Question:
Do you have a 4 wire wishbone trailer wiring kit that has a ground that runs the full length of the kit? Grounding seems to be one of the biggest issues so why not have a kit that the ground goes full length?
asked by: Doug
Expert Reply:
Wishbone 4-pole harnesses like # A35W42B, # A20WB, # W002230 and # A10-4225VP usually do have a short ground wire because most trailer frames are steel and they conduct well enough that a ground wire attached near the tongue will provide sufficient ground even for lights mounted all the way at the back of the trailer.
On the other hand if you have an aluminum frame trailer that does NOT conduct electricity nearly as well as a steel frame then you might need to extend that 2- or 3-foot ground wire back to where most of the lights are mounted to provide a wired grounding point. This can be done easily enough by connecting a length of wire like # DW02508-1 using but connectors like # DW05745-5. You can secure all the individual ground wires to the main ground by putting ring terminals # DW05705-1 on all of the wires and attaching them together at one point.
Dielectric grease like # 11755 applied to the ground point and ring terminals will help prevent corrosion and you can also use it on light bulbs and sockets to prevent corrosion there too.
Product Page this Question was Asked From
35 Ft 4-Way Trailer Wiring Harness - Wishbone Style - 42" Ground
- Trailer Wiring
- Trailer Connectors
- Trailer End Connector
- 4 Flat
- Plug and Lead
- Optronics
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Search Results: trailer lights
- Q&A: Left Side Trailer Lights Not Working With New LED Trailer Lights Installed
- Shop: LED Combination Tail Light Kit for Trailers under 80" Wide - Submersible - Driver and Passenger
- Article: Trailer Wiring Diagrams
- Search Results: trailer hitch
- Q&A: Lug Nut Torque Chart for Trailer Wheels
- Shop: Trailer Hitch
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Search Results: trailer tires and wheels
- Video: Measuring To Choose The Right Trailer Axle
- Shop: Trailer Wiring
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Shop: Suspension Enhancement
- Search Results: trailer wiring
- Article: Trailer Lighting Requirements
- Q&A: Comparing Kenda KR03, KR35, And KR53 Tires
- Shop: etrailer Anti-Rattle Hitch Collar for 2" Hitch Receivers
- Shop: Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Coiled Adapter Cord
- Shop: Brake Controller
- Search Results: trailer jack
- Video: Hands-On with the Hub Saver Hub and Wheel Protector
- Q&A: Instructions to Wire a Trailer for Electric Brakes
- Article: How to Measure for Trailer Hitch Drop
- Shop: Gooseneck Hitch
- Search Results: trailer leaf springs
- Shop: Trailer Wheel Bearing Kit for Lippert, Dexter, and AL-KO Axles - 3,500 lb with #84 Spindle
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Shop: etrailer Electric Trailer Brakes - Self-Adjusting - 12" - Left/Right Hand - 5.2K to 7K
- Shop: Base Plate for Tow Bar


