How To Replace 4-Way Flat On Trailer That Has 7 Wires To It
Question:
My boat trailer has a 4 prong flat connector with 7 wires that needs to be replaced but I can only find a 4 way flat with 5 wires .. how do I wire this up
asked by: Stan
Expert Reply:
When a 4 flat connector on a trailer has 7 wires it usually means it either has extra grounds or extra tail light wires. Most likely if the extra wires are white then it is ground, if they are brown then they are most likely tail light wires. The only way to know this for sure it to test the wires for function using a 12V battery and a jumper wire. Touch one end of the jumper wire to the positive post of the battery, the touch the other end of the wire to all of the different wires to see what circuit illuminates. Make sure you ground the wire that you know is a ground before testing.
If it turns out you have extra ground wires on the 4-flat then you can use a standard Wesbar 4-Pole Flat Connector w/ Jacketed Cable - Trailer End - 4' Long part # W787264 on the trailer and combine the grounds to the ground wire (white) on the connector. If it turns out the extra wires are tail light wires, the easiest way is to use 35 Ft 4-Way Trailer Wiring Harness - Wishbone Style - 42" Ground part # A35W42B and combined the running light wires to the 2 brown tail light wires on the wishbone.
Products Referenced in This Question
35 Ft 4-Way Trailer Wiring Harness - Wishbone Style - 42" Ground
- Trailer Wiring
- Trailer Connectors
- Trailer End Connector
- 31 Feet and Longer
- Plug and Lead
- 4 Flat
- Optronics
more information >
Product Page this Question was Asked From
Wesbar 4-Pole Flat Connector w/ Jacketed Cable - Trailer End - 4' Long
- Trailer Wiring
- Trailer Connectors
- Trailer End Connector
- 0 - 5 Feet Long
- Plug and Lead
- 4 Flat
- Wesbar
more information >
Continue Researching
- Shop: 35 Ft 4-Way Trailer Wiring Harness - Wishbone Style - 42" Ground
- Search Results: 16x6 8 lug wheels
- Shop: Lionshead Steel Dual Wheel - 16" x 6" - 8 on 6-1/2 - 4.77" Pilot - Silver
- Shop: Dexstar Dual Wheel with 5-1/2" Offset - 16" x 6" Rim - 8 on 6-1/2 - Gray
- Shop: Dexstar Dual Wheel with Offset - 16 x 6 Rim - 8 on 6.5
- Shop: Hopkins Endurance 4-Way Flat Trailer Connector - Trailer End - Ergonomic Design
- Q&A: Recommendation For Screws To Attach Pressure Treated Decking To a Flat Trailer
- Shop: Wesbar Wishbone Wiring Harness with 4-Pole Flat Trailer Connector - Trailer End - 18" Long
- Article: The Best Trailer Tongue Locks for Preventing Trailer Theft
- Shop: LED Combination Trailer Tail Light - Submersible - 8 Function - 21 Diodes - Square - Driver Side
- Search Results: over 80 wide lights
- Q&A: Is 16 Gauge Wire Adequate for Trailer Wiring for Lighting
- Shop: Trailer Wiring
- Q&A: Replacing a 4-Way Connector on Trailer with 7 Wires
- Q&A: Tracker Boat Trailer Wires With 7 Wires Connecting Into A 4 Pin Plug
- Search Results: peterson led lights
- Search Results: 7 wire harness
- Q&A: Replacing a 4-Way Connector with 7 Wires on a 2007 Tracker Trailstar Boat Trailer
- Article: Trailer Wiring Diagrams
- Shop: Tire Chains
- Search Results: receiver lock
- Search Results: hitch and coupler lock set
- Search Results: e99039
- Q&A: Trailer Hitch Size on a 2002 Chevy Silverado
- Q&A: How To Choose the Correct Transom Tie-Down Length
- Video: Trailer Wiring Harness Installation - 2006 GMC Savana Van
- Video: SmartStraps Gunwale Tie-Down Strap Review
- Video: BoatBuckle Tie Down Straps - Trailer - IMF10972BK Review
- Video: Review of InfiniteRule Hitch Locks - Standard Pin Lock - 34061072-D
- Video: BoatBuckle Kwik-Lok Transom Tie-Down Straps Review