Color-Coded 7-Way Wiring Explained
Updated 08/24/2026 | Published 08/17/2026 >
Question:
For this item what is the wiring configuration/function by color?
asked by: Frank B
Expert Reply:
Hey Frank!
Here's the standard for 7-way plug wiring:
Green - Right Turn
Yellow - Left Turn
White - Ground
Brown - Tail & Marker Lights
Blue - Brakes
Red/Black - Battery
Purple - Backup
I've also posted a photo of the standard wiring diagram for 7-way connections below. The TowSmart 7-Blade Trailer Connector w/ Jacketed Cable # TS74RR will follow this standard for the connections. You'll still want to test each wire for its function when installing. Manufacturers have made production mistakes (or else their own standards) in the past, and I've seen before where connectors can come from the factory with a different setup. Are you replacing a cable on your trailer or starting from scratch?
Product Page this Question was Asked From
TowSmart 7-Blade Trailer Connector w/ Jacketed Cable - Trailer End - 72" Long
- Trailer Wiring
- Trailer Connectors
- Trailer End Connector
- 7 Blade
- Plug and Lead
- TowSmart
more information >
Continue Researching
- Search Results: tie down strap
- Search Results: junction box
- Search Results: tiedown
- Search Results: sae connector
- Shop: Phoenix USA Junction Box - 10 Pole - 12V
- Shop: TowSmart 7-Blade Trailer Connector w/ Jacketed Cable - Trailer End - 72" Long
- Shop: Trailer Wiring Junction Box - 7 Color Coded Terminals - ABS
- Shop: Trailer Wiring Junction Box
- Shop: B&B Tow Plug and Safety Chain Holder - Black
- Shop: Erickson Re-Tractable Ratchet Straps w/ Push Button Releases - 2" x 6' - 1,333 lbs - Qty 2
- Shop: 14 Gauge, 7 Conductor Jacketed Wire - Per Foot
- Article: Trailer Wiring Diagrams
- Q&A: Lug Nut Torque Chart for Trailer Wheels
- Search Results: trailer hitch
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Shop: Trailer Wiring
- Video: Measuring To Choose The Right Trailer Axle
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Search Results: trailer tires and wheels
- Search Results: trailer wiring
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Video: Firestone Ride-Rite Air Bags with Easy Mount Compressor Feature Breakdown
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Shop: Suspension Enhancement
- Shop: Brake Controller
- Q&A: Comparing Kenda KR03, KR35, And KR53 Tires
- Video: Hands-On with the Hub Saver Hub and Wheel Protector
- Article: How to Measure Your Trailer Wheel Bolt Pattern
- Q&A: Does etrailer Carry Furrion Chill Cube w/ Heat Pump to Replace Dometic Duo-Therm
- Article: How to Measure for Trailer Hitch Drop


